What’s happening?

I’m overdue by a few days. Not last night but fri and sat and now tonight I keep getting sharp cramps very low down and some tightening in my stomach. No idea if it will carry on tonight but fri and sat it stopped and I slept normally. I also got these weird popping/clicking sounding noises low down which didn’t last more than 5 mins. I’ve had some thick mucus over the last few days too. No bloody show. Could these just be Braxton Hicks? Is it usual for things to stop and start like this? Just wonderknf when things might start to happen..