Hey! That sounds like me! I could have written a similar post! It's just your baby engaging by the sounds of it and getting ready for labour..... uterus doing it's thing. I've had sometimes strong period type pains too but they go away after a while.
Nothing to worry about just rest when you can
I find out today if our baby is engaged and I think bubs is because I have felt so much pressure in abdomen and groin etc.