Cervix checks

Cassandra
My mfm stopped doing cervix checks at 26 weeks and now I have weekly biophysicals and NST. When did your OB start doing internal checks? I've had a lot of lower back pain and increased cramping the last week or so. I'm 33 weeks and just wondering if my OB will do a check to see if I'm dilating or if they really don't worry about it at this point.