No period for 3 years and TTC??

Just wondering if any ladies have been in a similar situation? I had our son 21 months ago and me and Husband are planning our second. I got pregant as soon as i took out my contraceptive with our son. However i havent had a period since before i got pregnant with our son (other than after birth which was 4 weeks).. i stopped my pill 10 days ago. Is there a chance i could ovulate this month? Although i havent had a period in so long or should i wait until i finally have a period?? Thanks :)