What to do! 38 weeks

I’m almost 38 weeks and my partner was playing with my nipples during foreplay just now. I had to tell him to stop because I started feeling some intense pelvic pressure, followed by my stomach tightening. Although the pressure causes me to stop in my tracks I’d say it’s more uncomfortable than painful. It feels like my whole body is being squished together and idk whether it’s Braxton Hicks or real contractions. What should I do at this point? Wait it out or head to L&D??