Long Roads and Slippery Slopes

Hello everyone! I've been using MFP for about a week now and I'm really loving it, so I decided it was time to introduce myself.

I am a 28 year old mother who had a very hard pregnancy about 4 years ago. My little girl turned out perfect (whew), but it left me in a pretty bad state. I went from 150lbs to 280lbs in about 3 months due to complications in the pregnancy, and had to have an emergency c-section a month and half early. I've since then managed to get down to 190 .... then back up to 230... then well, it's just yo-yo'd between those numbers for 2 years now. I had/still have hypothyroidism, and then during the pregnancy my ability to absorb calcium and B12 was damaged leaving me chronically anemic. I'm in very good care and treatment for all this but the results just aren't getting me to where I need to be, and they're looking at starting blood transfusions if I don't start showing improvement.

The bright side:
I want to lose weight. I very passionately want to lose weight. And talking to my doctors, it's going to be a lot of pain, but if I can work through it, I have a very high chance of beating back the damage and avoiding blood transfusions. I've just got to take it slow and not get discouraged. When I try my hardest and see little or no improvement.... or even worse weight gain, yeah it's hard for me to keep exercising through the pain.

In other words... weight loss is a constant struggle for me, but I'm hoping I'm just stubborn enough to finally beat this and get healthier. I used to feel like I should give up due to my limitations... but now all I feel is that I want control back in my life.