bleeding after sex TMI

So me and my bf were having sex right before we got in the shower & after we were done we noticed blood on his penis, I didn’t think nothing of it because i heard it was normal for bleeding after sex.. but after i got out the shower , i wiped and saw blood, now i’m feeling just a little crampy & my lower back hurts just a little bit . is this normal? This is my first pregnancy, i just want to make sure before i make a false hospital run. im also including pictures of abt 10 mins after wiping the first time. (i’m 38 weeks & 5 days )

UPDATE : i put on a liner before going to bed, the liner just has dried up spotting. it’s 4 AM and i had to pee. when i wiped there was more blood, should i be concerned ? Baby is still moving fine