HELP!! Cramps. Is it stretching. Really worries.

Amyleigh

I'm 14 + 4 weeks pregnant with my first baby. The last week I've had lots of cramps and bad lower back. I already suffer from irritable bowel and ive been very constipated. Also I have a chronic pain and fatigue disease and was on a lot!! (25+) a day tablets before I go pregnant. I've nearly dropped them all now! I've had on and off cramps low down in my tummy. Nothing else. Still sickness, and no spotting or bleeding at all. But keep worrying. Slight pain in my one side sometimes. Also I had a stabbing pain when standing up the other day. Should I be worried or is it just stretching? It is my first baby Thankyou x