Advice Please!

Okay, so I am 30w2d pregnant with a little girl. I have dropped this week significantly and for the last week or two I've been getting spurts of pressure that makes my heart race, and the last two days they've gotten more frequent and today they've started to get painful like menstrual cramps. Can y'all give me some advice on what this could be? Do I need to go in? I still feel her strong and often. Help please!