redundant post?

Kristina
Sorry if this question has been asked a million times. Due nov 20. Had membrane sweep Monday oct 31 @ 37 weeks. Lost my mucus plus all week. 
Yesterday I thought that this was it... had a tiny bit of blood. Strong contractions that made me nauseated. Cleaned my house and packed every bag. 
Now today strong period cramps all day :(
Any thoughts? Early signs of labor or just normal Prego stuff?
Baby #3 but have never gone into labor naturally. These cramps have me curled over.