A lot of pressure

I’m 35+2 I started having some pressure in my bottom. My son gets in these crazy positions and like sideways😩my husband and I did the deed and now I’m having non stop pressure in my bottom and some lower back/hip pain. What could this be? This pregnancy has been wayyyy different than my two others with my girls and my youngest is 6 1/2 so it’s also been awhile. Anyone experience this. Labor soon? Normal? I haven’t had pressure like this before and it’s ALOT