2 weekends of upset stomach

Is it only on the weekends? Are you eating something on the weekends you're not eating the rest of the week?

It's not unusual to have more than one bout of the same stomach bug - typically with the second go-round being worse, since the surviving bugs have learned from their previous battle with your immune system.

You might want to look for patterns in what you are eating. New sensitivities develop. I had a "colonoscopy prep" reaction to a raw bag of spinach so I notified Dole of the problem so they could look/see any problems with that run of the stuff. They even sent me a refund unasked. Of course, I felt sheepish a month or so later when I had a raw spinach salad in a restaurant and had the same reaction. This is new. I eat raw spinach or spinach that hasn't been wrung out and I might as well drink a bottle of colonoscopy prep stuff. I pre-cook and wring out the spinach and no problem. Go figure.

You never know what it might be. My mother and I get stomach aches from cantaloupe and migraine-like headaches from chocolate. My husband likes the taste of lamb but it makes him nauseous. My sister doubles over in pain from green peppers and, when she needs a laxative, goes to McDonald's for a regular cheeseburger.

I'm sorry, you have my sympathy. I have days like that for no reason at all, (probably a med side effect in my case) they aren't fun.

Look at your diary and see if the weekends have anything in common. Even go back a couple days, in case it's just taking a bit longer for your digestive system to work it's way through your intestines.

If you can't find a common thread a check up with your doctor probably wouldn't go amiss. If you can find a common thread, try eating that during the week (take a couple sick days if you can so you can stay close to the toilet) and see if it happens again. If it does, you've found your culprit.

Good luck.