4 weeks and light spotting

Hey everyone! After 2 years of trying to conceive and two miscarriages last year, I received the BFP this morning. I'm having mixed emotions because of the past. I'm currently on progesterone from day 15 to 30 of my cycle and once I get my period I am supposed to stop taking it. I had light bleeding on Wednesday and Thursday so I stopped, but the past 3 days have been brown spotting, mostly light when I wipe, but a little more color today. My breast have been tender and the spotting threw me off which is why I took the test this morning because I had "that feeling". I just hope my pregnancy sticks this time around and I can celebrate my little rainbow baby ☺🙇‍♀️🌈