I have to be really honest and ask why you took the morning after pill and now are trying to conceive a month later? I don't know you at all, and i'm trying not to offend you, but maybe you're not ready to have baby? It sounds like "oops we made a mistake, I need a quick fix"...30 days later "let's have a baby..."
please help me understand where you're at.
As far as ovulation goes, you can't count the days after your period until you ovulate. It is usually different by about a day every cycle, and different for every person. My husband and I use natural family planning which is a way to know when you are ovulating so if you want to get pregnant, you have sex during your fertile days, and when you don't want to get pregnant you just don't have sex during that time.
It is very easy despite what most people say. And most people who say it's confusing or not worth it haven't actually tried it. I have two married friends that I have taught how to do it and they both struggled during the first month because they were not used to checking the three symptoms that you body gives every month to show you are ovulating. I encouraged them to try it for a second month because then you will have the first month to compare it with and they both have stuck with it ever since. The first month is just getting used to it combined with worry that you're not doing it right (even if you are). But it is well worth it. It's free, it takes two minutes a day and it's as effective as birth control.
The morning after pill altered your period because it forced you to shed the lining of your uterus and the fetus (abortifacient). Your hormones will be out of whack for a while, I am assuming.
If you want to learn how to know when you are ovulating, just let me know and we can start a natural family planning "how to" thread.