I can't figure out what's wrong with my birth control!?

I've been taking Sprintec 28 for almost 5 months now. After the 3rd month I thought I started to constantly get yeast infections. After finally going to the doctor and getting a pap, my test results came back normal. I figured I was allergic to something I was using, so I changed my soap, detergent, etc. to sensitive skin stuff. I STILL have my symptoms. I asked a friend of mine who is an EMT about it and she said it sound like I may be allergic to something in my birth control. All I get is a tingly feeling down there and a weird discharge. My doctor gave me a sample of BEYAZ but I have 2 weeks until I'm finished with my Sprintec 28 pack. Can anyone recommend a birth control for me?