8 weeks question

Hi girls :)

I’m 8 weeks pregnant and I’ve having some light brown vaginal discharge. It is not constant but I do have it. I’ve been to the doctor and they said it can happen during the first trimester. They checked me and thankfully there’s no blood or any red discharge.

I’ve done an ultrasound yesterday and the baby is fine and we even saw the heart beat🙏🏻

Has any of you experienced this? How long did you have it for? I’m trying to understand what’s going on😅