I did have some pretty severe sinus and throat problems in the 1 month that i was on this pill. It still hasnt cleared completely. I have sore throat, dry throat, pain behind ears. My ENT did an endoscopy to check if i have acid reflux or post nasal drip. But there was nothing wrong there. So he has concluded that this might be because of hormonal prob. My family doc told me that before periods, my fluid retention might be going up and this can cause a feeling of a lump in throat and sinus problems. all docs have told me to wait till the hormones sort themselves out.