To see Dr or just keep an eye?

Kelsey • Mommy to a beautiful 5 year old little girl and handsome 3 year old little boy. Another sweet Baby boy coming in May!
I am 20 weeks along and experiencing some pretty intense lower abdomen pain. Similar to my period cramps I had before (they were awful). I've had  few Braxton hicks in this pregnancy but this isn't Like a contraction to me, there's no tightening. Any advice?