Few cycles with med.
If you get back on the pills, 2-3 cycles is the usual period of time to get you regular. Without the pill, you likely won't be regular because you were not so during your teenhood.
So, if u want the regularity, consult doc to possibly going back to the pills.
Congrats on the baby! he/she may soon need a brother/sister to play with :-) good luck.