Ob-Gyn questions? Ask a gynecologist online.
Hello, I am an OB/GYN and I can help you with this. What you are describing is not likely related to a sinus infection unless you are taking antibiotics that could interfere with your birth control pills. More common is that you are experiencing spotting related to endometrial atrophy. This sometimes happens in the middle of the pill pack due to the progesterone in pills thinning the lining so much that it actually bleeds (kind of like chapped lips). This will look like brownish spotting. It is very annoying but not at all harmful and as long as you are taking the pills as you are supposed to, you are protected against pregnancy. If it continues, you can talk to you doctor about changing the dose of your pills. This can be seen for any reason at any time with any form of hormonal contraception. It can be related to a change in weight or issues with your thyroid, but is often just a side effect of birth control.
The bleeding can be heavier or you can actually have a cycle in the middle of the pack, it just depends on how thin your lining is. This can also happen if you have been on the same pill for a while or if you miss some pills. It is possible that you can continue to bleed like a period until your actual period and then when you start a new pack everything goes back to normal OR this can continue in the same manner, which means that you will likely need to change the dose of your pill or switch to an alternative method. Keep monitoring it and make an appointment with your doctor to discuss changing birth control if it continues.
No problem. If you have further issues, please let me know. Thank you!