TTC WITHOUT PCOS...HELP!!

Tee • Mommy to an angel baby born on January 22, 2014 at 20 weeks. #AidenLewis BFP 3/1/2015 BABY GIRL DUE 11-5-15
A little back story... I started my period when I was 11 and they have always been irregular. I lost my virginity at 18 to my current boyfriend (btw I'm 21). In 2011 I was diagnosed with pcos. I randomly got pregnant in September 2013. Gave birth to my son on January 22, 2014 at 20 weeks, he passed. Now since having my son my periods have pretty much became regular...coming almost every 30-35 which is way better than the 4 periods I'm used to in the year. Now I've been ttc since March without any luck. Any tips or advise???