Baby born at 35 weeks

Ok so this is my 4th baby and I've me experienced Braxton hicks contractions until this pregnancy! I have had lots of pressure for weeks now and my dr checked my cervix a few weeks ago and I was thinning out and not dialiated I go weekly due to high risk but this week he's on vacation so I go next week as well as my every 3 week ultrasound. I am having pressure yet again and spratic contractions. My pelvic bone is also shifted and it's a painful thing as well. But I'm 35 weeks today and I'm scared to death of preterm labor!!! Is anyone else at this week going through anything like this???