TTC - Any tips ?

Has anyone been on Depo and TTC ? 
Ive taken 2 shots. Period came back right away but for the last 2 months ive just Spotted for 2 days. Any Tips? How long did it take to finally have a BFP
My 1st pregnancy it only took 3months to get pregnant but thats because Ive Never was on BC. Only condoms. And I had just started being Sexually active back them. depo was taken right after having my son back in July 2016. Was off since March 2017