I waited a month. I did not have sex until after my period returned.I was 5 weeks along but the doctor did not tell me not to have sex but i was afraid too.Read this:http://www.miscarriagesupport.org.nz/health.html
It is best to wait until your full period has returned, and ended. The cervix is probably still open, which means you are more susceptible to infections, and another chance at getting pregnant. Please give your body time to heal properly. You will thank yourself later.