35 weeks 3 days

Karlee • ❤️ Soon to be mom to Giovanni Sebastian Francis Fliegel ❤️
I'm only 35 weeks 3 days 
But I've been having period like cramps but worse! In my lower stomach...
I don't know if it's Braxton hicks or actually contractions.
I move and it hurts, I don't know maybe it's just me but I'm scared I may be going into preterm labor...
Advice? I have a doctors appointment the 29th... 
what should I do, I think I lost my mucus plug about a week ago... just no blood.