16 & ttc

I am 16 almost 17 and I am ttc I've been pregnant once unfortunately I didn't go full term. I have a fiancée. And we've been together for 5 year almost 6. We've got our own apartment and he's going to college in September to be a welder. We have a sex of wheels. Actually 2. But we want to start a family young. But I hardly ever get my period. Do my question is can I still ovulate? And should I wait?