Uterus pain

Su

I’m 6 weeks into my second pregnancy and I’ve been having sore uterus pain. Last night I coughed and I must have been laying at a weird angle because I pulled the sh*t out of my uterus (I know that sounds weird but I don’t know how else to describe it) OMG it hurt so bad. Today it’s been feeling super sore and achy (no bleeding though). Is it round ligament pain I’m experiencing? But it’s too early in the pregnancy for that, right? Just increased sensitivity? Is it a sign of weak pelvic floor muscles? What do you think?