After having two regular period it is considered safe to TTC.I hope your doctor has already evaluated and treated(if possible) the cause of abortion and still birth.Good luck.
i am very sorry to hear about your abortion and still birth. the month in which you try to conceive is irrelevant. women ovulate, that's release an egg, 14 days before the first day of the next period so around that time would be your best time for trying to conceive. good luck.