The start?

I’ll be 36wks tomorrow and all day off and on I’ve been having lower pelvic period like cramps. Maybe a 2/10 scale. I’m also having heavy pressure on my vagina opening area if I go from sitting to stand. Also some very intense lightening crotch off and on when I’m walking or sitting down and lean to the side. I’ve also been having watery like mucus come out the last week. But no mucus plug type thickness.

I don’t know if that’s normal or the start of something.