I am a few days ahead of you, but mine have certainly ramped up the last few days too.

I find the best thing for me is rocking my pelvis side to side slowly, or on all fours a few times they have been really bad.
Other than that, and just breathing through them, there is really not much you can do about them - trust they are doing helpful positive things and know your body is doing exactly what it should be to get you ready to birth that baby.

Mention them to the Dr, but again, nothing he can do about them either.
I didn't have them much at all with my DD so can't tell you how long - can tell you that a few women on here have had 'pre-labour' last for a good few weeks, others a couple of days. So no rules, only your body.

Good luck!