TMI.. Sex related?

Onnilee • Adalynne Grace 09/11/2016 🎀💕👑 Tinsley Saylah Joy 04/24/2019 💜🌸👑 Evangeline Elizabeth due 04/02/2021
28 weeks and 4 days.. My husband and I had sex this morning, nothing rough or unusual. He finished inside of me. After I took a shower and then started some laundry. I started having a few Braxton hicks contractions. Then I ate and relaxed and went and got a mani and a pedi (had some Braxton hicks contractions) then my SIL and MIL went grocery shopping with me (had some contractions) and also having difficulty urinating I texted my best friend who just had a baby and asked if it was normal and she said if my husband came inside of me that it can cause contractions just wondering if what is happening is considered normal? Sometimes I feel like I'm having an asthma attack and some period cramps.