First Postpartum Period

My baby is 10 weeks old and I am just now getting my first PP period. Before I got pregnant with her, my period was suppppper irregular. Has anyone else been in my shoes and had their periods come on a set date after having a baby? SO and I really want another baby sometime within the next year so I really want to start tracking my cycles and figuring out days that will have the best chance of concieving. If my periods are super irregular like before I'm scared we won't be able to have another baby when we are stable enough for one