Trying To Get Pregnant!!

I’ve been trying to get pregnant for 5 months now & still nothing .. idk what to do . Its really depressing cause me & my fiancé feel we are ready but nothing has happened yet . Some days i feel nauseous & a little different but idk & i dont wanna get mine or his hopes up . Is there any suggestions on what i should do ? Also another struggle about it is im irregular so it’s hard to tell when im ovulating 🙄 . I just want to have a little blessing already😭🙏🏼 . Anything will help!!