39 weeks with odd symptoms?

I've have decreased fetal movement all day and she only just hit her kick count two hours ago. Just wondering if anyone who has had a baby before or has recently went into labor has felt tingling in their tailbone?

I've tried looking it up online but all it comes up with is tailbone pain which I'm not having, it just feels like a lot of tingling on the right side of my tailbone. On another note every movement I make gives me extremely bad menstrual cramps and standing feels like the baby's trying to break the front of my pelvic bone and fall out of me at the same time.

I am going to go into L & D tomorrow if she moves as little tomorrow as she did today.