Did you have a C section with your first, or do you think your stomach muscles were damaged with the last pregnancy?
You do show earlier with subsequent pregnancies because your stomach muscles aren't (usually) as toned so can't hold everything in.
I'm 10 weeks and can barely fasten my jeans now that 10 weeks ago were loose around the middle. I have some maternity jeans already but one lot are "under bump" and they need pulling up all the time as they slip down, I haven't taken the tags off the rest of the maternity stuff because my mum doesn't know I'm pregnant yet and I don't want her to find out because she spotted me wearing maternity jeans lol.
Most of the time now I'm wearing my old jeans that are a size bigger, or wearing my stretchy jeggings or jogging bottoms.
Not sure about the cramps though, I haven't had any for a while now.
However, I do feel bloated and get wind pain quite often.
Maybe you could speak to the midwife or your EPAU and hopefully they can reassure you x