Tmi So I had sex with my husband about an hour ago and now I'm having minor cramps that come and go…

Tmi

So I had sex with my husband about an hour ago and now I'm having minor cramps that come and go should I be concerned or is it normal also my lower back is hurting I can tolerate the pain it's just uncomfortable I am a FTM so I have no idea I haven't had sex in the longest time ever so I don't know if it's normal