vibrating pelvis!

Hey ladies. TTC #1 here after a chemical last month. 
I had ewcm right after my period for about 2 days and I BD I also had watery cm on cd 17 and 22. I BD on both days. 
It is now CD 24 now and on CD 22 and 23 my uterus was vibrating! I thought my phone was ringing but it was no where near me! Crazy stuff. Anyone with this experience?