About when do I ovulate?

My boyfriend and I have been together for years. We’re not preventing pregnancy, and we’re not actively trying to get pregnant. We’re putting this in gods hands and will receive our gift when It’s time I truly believe. But with my irregular periods I’m just not sure when I ovulate. And we done want to constantly buy ovulation tests ^. what are some signs from our body when we ovulate? please let me know! thank you