No AF in a loooooong time

I haven’t had AF since I was pregnant with my 9yo. I had Marina after I had him and never got a period. Got it out and I got prego the following month. Now I’m ready to have another baby and nothing is happening. Baby was born in July 2019. Was breastfeeding and had the depo shot. Well had last shot in April and baby stopped breastfeeding in September. Any advice for me. I’ve made a pre conception apt next week. I’m not sure what is going on with my body. This whole thing makes me so upset. Idk. Maybe I’m overthinking things.