Is it normal? 😔

Sarah-Jane • TTC 16 months💏We did it🤰🏽Sophie born 10/7/18💕
I've been off the pill 10 months and for 6 months I had normal period (26-28 days) they were 5 or 6 days and a medium flow and no pain. The past 4 cycles I've spotted brown from anywhere from 8-9dpo to AF arrives, it starts browny muscousy then just brown until the bleeding starts? I've had a baby (she's 10❤️) smears, 21 day bloods, checks, thyroid tests and waiting on my internal scan and hsg. My doctor assures me my hormones are ok and I'm not going through the menoupause (I'm 35) Surely this isn't normal and stopping me getting pregnant? It's normally only when I wipe each time and a tiny amount on my panty liner. I'm freaking out a bit here and worried everything isn't ok 💔😢