Question about pain

I am a FTM I am 38+3 weeks along I know pain is completely normal. I am scheduled for a c-section this coming Monday due to baby being breeched. I lost my mucus plug 2 days ago or a part of it. And have been spotting off and on the last few days. Now my question about the pain I’m having is I am having worse pressure in my lower area. I move and I am in pain to were it feels like I shouldn’t be moving. I lay down And still in horrible pain. And sitting in general hurts bad. I have been having regular contractions but they are 20 minutes apart and last about a minute and a half also for the last few days. Any idea what I should do? Should I go in just in case, should I wait it out and see if it gets worse. Any advice is greatly appreciated