I had bad cramping when I was 8weeks that's how I found out o was pregnant. They told me it's normal as long as no spotting or bleeding
I cramped constantly super early in pregnancy. I didn't think I was pregnant because I cramped so bad early on - but now I am 17ish weeks and I still cramp. So it can be pretty normal for some women.
I would call your doctor, many things can happen which may not even be pregnancy related, kidney stones, bladder infection, even just gas, but I would see so you can have peace of mind, prayers for you.
Cramping is normal but bleeding is not. If you are super worried you should call your ob or go to the er. Good luck!