Is it possible?

Now that my husband and I are actively TTC baby #1, I have learned a lot and so much from you ladies and your questions on glow. Is it possible to have had a miscarriage and not even know it?! I see how you ladies agree that a very very faint line means your pregnant and about 5-7 months ago I took a test because I had symptoms and got a VERY faint line but thought nothing of it even my hubby was like it doesn't mean anything.. So we let it go and eventually got my period. Not sure how soon after, it's been a while but stuck with me and only thought about it because I see pics up.