Is it too early for this to be happening? WORRIED!

Leah Margaret • 3 children to adore, and adding one more! My fiancé Craig and I are expecting pink bows on 06/04! 🎀
I wanted to ask you guys if you've experienced Braxton hicks yet so far in your pregnancy? If so when did they begin? I'm due June 4th with my 4th child. That makes me 20+2 weeks along. I had horrible Braxton hicks with my youngest son, who will be 6 on 02/21, but I can't remember when they started. Because I'm only half way through the pregnancy I'm worried. I plan on calling my OBGYN today, and I have an ultrasound appointment on Friday for a cervical check. I wanted to also mention that I am high risk due to a LEEP done as a teenager and the medication I'm currently on; medication that I can not be taken off of. Please, any advice or any answers would be greatly appreciated. 🤓