OK so sure you've all heard this before but I'm so scared. I'm 37 years old and have two young girls. Im going through a divorce and suffered a recent bereavement. 

Two weeks ago I started to get really bad stomach cramps and diarrhea coupled with Nausea and light-headedness.  The diarreah has since fluctuated into constipation and when it does my sides and lower back hurt. The stomach cramps got worse but have now eased a little but as I say increased on sides and lower back.  I had four days of awful migraines.  My poops are narrow  though I haven't seen obvious black sticky tarry poops. In fact very yellow. 

I'm super super frightened. I was diagnosed with IBS about 10 years ago but I've just managed it and it's never been like this. This all feels new and unusual and more painful. I've had a history of piles also. To make things worse I just found out my estragend father at 60 had cancerous polyps removed. 

Please help calm me. I have to do three poo tests and blood tests and I've booked a appointment with a specialist on private cover.