Ttc help!

We have been trying for a baby for a year, I got pregnant in September and had a miscarriage in October. Since then I haven’t been able to get my bfp and it’s very disheartening 😞 I started trying to track ovulation with opks but when I tested it had a faint line one day the next day it was nearly positive then the next day it was just gone. Does this mean I’m not ovulating or not fertile?