TTC at 19 with baby #1 & i feel like giving up any advice ?

Jasmine • Rene Jr.👣💙 Eliana👣💜
I'm 19 and my fiancée is going to be 21 next month. I been TTC baby #1 for 4 months now and nothing still. I just took my first ovulation test and it came out im not ovulating. I feel like its me because my fiance has a kid already with his ex. I just feel like giving up. I want my miracle baby.