Certainly! I wish I had that problem!
Don't worry nothing will happen its normal
Orgasm can spur contractions, however, doctors tell women to not engage in sex at certain points during pregnancy more due to the cervical issue. Sex, checking of the cervix, etc. can all lead to labor. But what can you do, you were asleep. And unless you've been told that you have a pregnancy restriction from sex, none of it (including orgasm) should be a problem. good luck