GIRLS ADVICE ??

so this month for about a few days i was on antibiotics and i didn’t have sex , i am on the pill & also i wanted to make sure i’d be good so i didn’t have sex for 7 days after taking the antibiotics but i still was taking my birth control pills like i usually do , i haven’t really had a period it’s more like a supper light period and idk if this is normal!! please help , the first pic is on the 3rd day of taking my sugar pill in the morning and the second is from the 4th day which is today for me