BFP then Spotting

Natasha • 💍8-6-16. 🌈👶🏻 Baby Girl 4-19-18 🌈 👶🏻 Baby Girl 6-3-21 👶🏻#3 Due 9/23

I got my BFP a week ago, were so very excited!! I was spotting briefly not hardly enough to think anything of it yesterday and it was brown then today I had a heavier spotting that was brown and a little red I found this in the toilet after I went to the bathroom. Is this something to be concerned about? I have an appointment tomorrow morning, so I'll ask about it but just wanted to see if any if you ladies have had a similar experience?