Possible food poisoning?

[Jimboslice67]

I was heading to work Saturday and I was in a rush so I grabbed some doughnuts. The catch is. They're about a month expired. I ate about 3 of them then realized how bad they tasted. I was in a hurry, didn't have time to look at the expiration date. I had 3 small ones. The day went on I felt naseasus. Now 3 days removed I still have slight naseau. I'm very very pissed at myself right now. I had acid reflux problems about 6 months ago that lasted about 2 months. I'm experiencing similar symptoms which I've read about, it happens.

I'm a big baby about naseau. I hate it, I can't throw up anymore I've almost trained my self that I can't do it. I just wanna know, these doughnuts have to be causing this? Ive also been constipated since then, and my body just seems in complete shock. When should I go to the doctor? I feel hopeless again and the stress is probably not helping. Also feels like gas I stuck in my GI tract and I burp a lot. No heartburn though. Just naseau.