My husband and I have been TTC for almost 6 months now but I think me breastfeeding our 18 month old is making it hard for us. I just got my period back last month and have been having sex on every other fertile day. I took a first response test 10 days after I had sex and thought I saw a very very faint line so I waited till morning to retest and got the same. I decided to take another a week later to confirm and see if it got more visible but I used a store brand and got nothing 😞 any tips or advice??