Hello

This is probably going to sound stupid and I know nobody is a doctor on here but I just need to vent because I'm really scared.

I'm convinced that I have bowel cancer. I'm 18 years old and just before Christmas I was experiecing some stomach pain and I had it for the best part of 10 days before it subsided again. About a week ago I started having diarrhea (no blood or anything) however I suffer from anxiety and I was going through something very difficult and so this was normal for me. I had the flu all of last week and I had no appetite and I was still having the diarrhea however I am now eating again. I went rather constipated by the end of last week however this week I'm starting to panic because I'm passing normally now but I've noticed a lot of mucus around my stool which is of a yellowy/brown colour (TMI I'm sorry!) and I also noticed a hard black bit of my stool and now I'm crying because I'm convinced that I have bowel cancer. I've had mild cramping and for the past few days I've felt a sudden urge to go and then I'm fine afterwards however from what I've researched things are not looking good and it all points to cancer.

I'm in the process of registering with a GP as I've recently moved to a different city and so I'll try and get an appointment however I just feel so overwhelmed with anxiety and I don't know what to do. Any advice?