Trying to conceive

I am trying to conceive. I haven’t seen my period since Jan of 2018 like it just didn’t come on. Not pregnant. Last month I went to dr to find out what’s going on they told me nothing. Dr gave me a pill to start it & I took it for 10 days. My period came on and was on for about 12 days. Well it’s a new month & I still have no period. So idk if I should try birth control for a couple months or what but I want another baby. What does anyone suggest ?