Genital region puckering

Kara • Enjoying time with the little guy before trying for a second ❤️
Haha this sounds weird but I don't know how else to describe it. I'm 11 weeks and yesterday I just started feeling a slight pucker every now and then in my genital region. We saw the baby and heard the heartbeat yesterday, everything is fine. Just wanting to know the cause of this or if anyone else has experienced it because I can't find anything on Google. Grazi!