33 weeks and feeling like my period is coming

I've had cramps and pains my whole pregnancy, currently being watched for early labor because of it and because my belly is measuring so big (41 at 30 weeks least time I was in). So it's not the cramping that is bothering me or a surprise.

I can't accurately describe it, but my abdomen feels like jello, I'm feeling exhausted, my cramps aren't painful or even dull just achy, and I just feel so gross.

Has anyone else felt this way? I'm a FTM idk what's normal or what to expect. I have my weekly appointment tomorrow with my OB. So I'm going to mention it then, I just am not sure if this is something I should call about now.