Feeling off, help???

Hi girls,

So since the beginning of January I've been getting stomachs cramps, diarrhea and nausea every few days as well as weightloss, I've been to the doctor and they didn't really say much just did some stool tests which came back clear, I'm really sick of it and don't really want to go back to the doctor unless I have to, so I was wondering has anyone else had this problem or does anyone have any suggestions to assist??

TIA