CD64 blood test....BFN

Ashley💄 • Me 33, SO 37 ttc#1 for both of us. Been trying to actively conceive for over 6+years. Diagnosed with pcos and Incompetent cervix. TAC placed in June 2018. FET #1 BFP due 10/2019.
Got a bfn today from my blood test. Starting prometrium to initiate a period and then clomid this cycle.....anyone had luck with clomid their 1st cycle on it? I'm getting so frustrated with ttc but it's my only true dream :(