34 weeks pregnant with twins. Sex or no sex?

Hello everyone. I am exactly 34 weeks pregnant with twins today. My husband and I have been abstaining from intercourse the last few weeks because we have been worried that it may cause me to go into labor. I know they say that sex only works if the babies and your body are ready but I am still nervous. Anyway, I am feeling like I would like to do the deed but then in the back of my head I am worried I'll go into labor. I asked my doctor at my last appointment if I needed to make any lifestyle changes or stay away from doing anything and he said no. But I did not straight out ask him if I should be abstaining from sex. What do you ladies think? Should I go for it or wait until I am at least 36 weeks?