Contractions after sex.

Beth

Second baby. I’m 37 weeks 6 days and day before yesterday me and my partner had sex and he ejaculated inside. About half hour later for 4 hours I had very timeable and EXTREMELY painful contractions. It got to the point where I was about to ring labour ward then they tapered off and since then I’ve just had lower front and back cramping constantly. It hurt me so bad and felt exactly like my last labour but now they’ve stopped I’m confused. Also had insane pressure and kept having to run to the toilet thinking I was gonna poo myself for nothing to come!!! was this false labour or what? 😩 x