Faint bfp....

Can anyone help me? I’m confused! Back story me and OH are 32 and 35. We have two children who didn’t take long to conceive. We are ttc our third, which has been two years and 4 miscarriages and 3 chemical pregnancies. So am a little apprehensive....I had what I thought was my period on 5 June it was super light and no pain which is unusual it never hit the pad only on wiping for three days (usually 5 days and heavy with cramps). My cycles are usually 28 days. Well I felt funny a week later and went to the doctors who did a blood test which came back negative. I tested a few times after BFN. Well on the 11th I had EWCM but this was super early for me at CD6 and what felt like ovulation cramps. The last few days I’ve felt terrible so took a test this morning which would be CD19? And it popped up faint bfp not even a squinter on a FRER(I’ve done two and still bfp even after a short hold) as I So my question is if I did conceive on 11th how many weeks does that make me as the app is saying 2 weeks 6 days which makes no sense surely I wouldn’t have a bfp this early! But then if I conceived before then wouldn’t it be a darker bfp by now?