BH or the real deal?

Jaxkie
Even though this is my second child, I don't know what time difference is between Braxton hicks and contractions since I never felt them until I when into labor but it's been 4 years 😫 I'm having some lower back pain as well as in the front, it's very uncomfortable but don't know if it's actually the real deal since my belly hasn't "dropped" or atleast I don't think. Plus I'm 35wks3days, too soon? 
Please help!!