Yes, it is likely that you may have retained this piece of flesh from your earlier abortion
and expelled it now, but, in such an instance, you would have been bleeding or spotting persistently and chances of infection would rise. Another possibility is a chemical abortion with yet another pregnancy
now. You can cross check with a serum beta-hCG
titre estimation which would no longer be higher with the earlier pregnancy while it would be positive with a recent abortion. A trans-vaginal sonogram may be of some help. Take care.