Welcome to HealthcareMagic forum.
First of all, relax. Since you had conceived spontaneously once already, you wouldn't end up becoming infertile. You should be able to conceive again.
Now coming back to irregular period, I would like to know whether your periods have been always irregular and how long ago did you abort?
Cyclical events that occur during menstruation
are governed by cyclical hormonal
changes in the body. The rhythm does get affected with the use of frequent morning after pills. Further regularity of menstrual cycles can take upto 2-3 months following medical abortion
to return to normal. In addition to these physical stress
and other physiological cause can cause irregular cycles.
From what you mentioned, it is most likely the morning after pills, recent abortion (if that was only a few months back) and stress factors which could be causing your irregular periods
I suggest you to wait for a few months. If your cycles do not become regular, you can try oral contraceptive pills
briefly for 3-6 months. This should get back the harmony of intrinsic hormones and achieve regular periods. If cycles persist to be irregular, then you will need further evaluation by an able gynecologist.
That being said, since you had conceived once, I do not find any reasons why you should conceive again.
Hope this helps.
Wish you good health