Brown spotting?

Ra

So i had my baby 3 months ago and I have had 2 normal periods since then but this month ive just been having light brown discharge instead of my period 😳

I don't think the Mr pulled out a couple times so pregnancy is possible but if this is just normal post pregnancy stuff then i dont have to do the 20km trip into town for a pregnancy test 🤷‍♀️ plus I'm breastfeeding so I've heard that messes up your period as well.