I had my last period about 3 weeks ago and for the last few days I've been bleeding. At first it was dark red/brown then it went more period like and now it's only really there when I wipe and it's brown rather than red. I did a hpt and got -ve. We aren't TTC yet so have been using condoms but nothing else. I'm wondering if it's implantation bleeding and not showing +ve yet or whether it's something else.