Does this sound promising?

I'm due in 2 days, I've had 2 membrane sweeps in the last 2 weeks, I've lost my plug on 2 different occasions (not much) and last night I was up from 3am-6am with period cramps. Consistent, not come and go like contractions though. They'd get a bit more intense here and there but nothing regular. Still have consistent dull period cramps now at 1030am and have been losing large amounts of my plug again for the last 15 min. 
I wish there was a green light that comes on to let me know this is for sure the start of labour. Anyone have any input/advice? I know it can arrive in so many different ways. Just getting anxious!