Wow What a lot of stuff you have to deal with.
First of all, is your doctor just a doctor or a GYN? If you're not hooked up with a GYN, you need to be. You might have some other kind of condition that has not been caught. I know it's hard to see so many doctors but your problems seem really frustrating and it might be worth another try with someone new, to start fresh.

Regarding the mood swings - are they related to your cycle? Or no? If not, you could be suffering from depression or something else. It might help to visit a doctor to discuss that.

How could you be anything but feeling depressed when all of this is going on? I have a very similar story. Started periods when I was 11. By 15 I still was no where near regular -either bled all the damn time or not at all during track season (Feb-June). Every period sucked. I bled so heavy and the cramps were so bad that I would actually pass out. I also had intestinal issues right before. Constipated a couple days before, then the first day I bled I couldn't stop going. This lasted a few days, then at least that would normalize. I finally went to see an OBGYN when I was almost 16. She put me on pills to regulate me and found that I was anemic. This seemed to work for a while as far having more regular cycles, however the cramps and flow weren't really affected. Still heavy and still hurt, though my "out of commission" days were only one or two a month. I had to switch pills every year or so because they stopped keeping my cycles regular. When I was in college, I started spotting between periods again. The only thing that doctor did was switch pills almost constantly. I was on them four months, if they didn't work, he switched. Talk about mood swings! It's a wonder I had any friends! We finally found a fairly high dose pill that seemed to work. Cycles regular, flow a little lighter, cramps easier to take. I found out that endometriosis runs in my family, but he was unconvinced. After college, I moved and finally found a wonderful doctor (I went though more than a few). All of the previous symptoms began to return, so he put me on an even higher dose pill and told me that he was 90% sure he knew what was going on, but that I needed surgery to be sure. Once my rider was up on my insurance (apparently, the mere mention of endometriosis being in my family on my previous doctor's records was enough to put a rider on it) we went for it. Turns out, it was endometriosis. We were only "feeding it" with the high estrogen pills, but my doctor was forced to treat my symptoms at the time. Due to the location of some of the lesions, they couldn't all be removed, but he did what he medically and safely could. I went on a low dose pill. Two months later, all of the original symptoms returned. I even passed out at work more than once (I work with all men, try explaining this to them...). He decided to put me on Lupron. Other than that or having surgery outside the US, or having a full hysterectomy (at 26) that was my only choice. He told me that I would be on it longer than the recommended six months (I don't want kids, so I didn't care. I'll adopt if I change my mind). I was on it for 18 months (along with progesterone therapy after six months since I was in "menopause"). The side affects included hot flashes, night sweats and mild acne (I did not gain weight). All very tolerable when compared with everything else. It worked. I've now been on microgestin for over a year and I feel so much better. I take it continuously and don't have periods or any spotting. The key is to keep the estrogen low and to keep me from having periods. The endometriosis will eventually come back since there is no cure -though they are very close to it in Europe.

Sorry about writing novel. I tend to do that I guess the key here is to keep going to different doctors until you find one you like. I asked around to find mine. I also talked to other women who had or have similar problems to get a feeling for what their doctor was like and what he would do to help me. Stay persistent and find one that is willing to help you and all of your symptoms. It may be frustrating at first, but finding relief is the most important thing. Find out if that is why you are "depressed" before you get seek antidepressants. My horrible cycles and hormone imbalance were my depression factors, not depression itself. I wish you the very best of luck in finding relief. Periods can really suck for some of us. You can find relief though!