BH vs real contractions.. FTM

Brittany • Mama to 2 girls! 💗 🤰🏼 with number 3!
So I think I have been having a mix of both the last few days. But I really don't know so please help! I'm 38+2 .. Sometimes I get where my belly just balls up tight and I feel like baby is going to pop out .. I'm assuming this is a BH? Then other times I get the same feeling but have pain with it and feel like I almost need to poop- a lot of pressure.. I'm assuming that's a contraction ? I wasn't dilated at all last week .. Hubby and I had sex for the first time in forever yesterday & ive been walking more so I'm hoping things are maybe progressing. I've had the most BH/contractions since yesterday after we had sex.