Had a d&c back in early june for an empty sac. bled for 2 weeks haven't since. could i b pregnant again or some other reason?

Pregnancy: Have your had a normal period since your d&c? If you have, then you can expect ovulation in the middle of your cycle if you have a regular one. If you feel you may be pregnant, do a pregnancy test. If negative, but still concerned, repeat in 2 weeks. I recommend getting 2-3 regular cycles for your uterus to recover and then start again.