I'm confused

I have been very stressed lately, and not feeling well.. but this has just been bothering me. I have been very bloated, more bloated after I eat. I have been constipated, and having cramps and feel like period cramps but I already have finished my period last week. I have gotten bad gas pains and bring up burps and sometimes I can't even eat. I'm on the birth control patch too, so I don't think I could be pregnant either.