Serious question! 35 weeks!

Deserie
I am currently 35 weeks with my second. And am 1 cm dilated. The doctor said she didn't feel my mucus plug when checking me and that baby's head is very low. I have been getting those lightening sensation here and there meaning baby is hitting my cervix. Is it ok to have sex withhout fearing of starting labor??!!?? My husband has been so food I haven't done the reef in a good month or so and really would love to feel that connection with him...since toiu can't for 6 weeks after birth. I am just terrified of starting labor up. Please please let me know what you think..