No period/extremely light period on birth control?

I’m on my placebo week this week and instead of getting a normal period, I got something different. Started my placebo pills, Sunday and then Monday after work my underwear was stained with brown blood and then I put a panty liner, changing every now and then it sometimes I had some drops of brown blood and sometimes I didn’t. I mostly have blood when I wipe after peeing and then nothing on my panty liner other than maybe a drop or two !!! This light brown blood/spotting lasted until Wednesday. Before this week I sex with my boyfriend twice and we use a condom every single time, I am on antibiotics for this issue I’m having so my doctor told us to use condoms even though we use them every time. I’m going tomorrow to my doctors tomorrow for a regular checkup, should I ask her about it if it’s normal ?? Am I pregnant/should I take a test next week ?? I’m in college, not looking for a baby right now.