Hi, I Just Started Birth Control Pills Almost 4 Weeks

Hi, I just started birth control pills almost 4 weeks ago. The week before I started the pills I had a yeast infection but I took the pill to get rid of it. But for the last couple days I've had discharge again, some days more than others, and I'm not sure if it's because of the pills or if I have another infection. I don't have an odor this time though and there isn't much itching.