Pelvic pressure, please help!

Tj

I’m 22 weeks and since this morning I have been feeling like I need to push to the extent that I actually have to make an effort not to. I am feeling like I need to poop and had a loose stool this morning but it feels like I still have to go. I have PCOS and have had a miscarriage before. Is this preterm labour? My doctor doesn’t work in the evening and has no email/after hours service and the only place I can go to would be the ER. Should I go? I don’t feel any pain, just feel like I need to poop/pee.