NuvaRing and effects of drugs

I have been on NuvaRing for 2 years. At first I thought it was wonderful. But now two years later I am connecting all my health problems back to when i started taking this BC. For two years I have had horrible nausea and digestive problems and weight gain.I also have had horrible mood swings and emotional instability. And worstly I have had horrible sinus problems. In fact I had sinus surgery which did not help. I also got a therapist and started considering seeing a doctor about the digestive problems. But after some research and connected the dots on the time frame of all these sudden health problems.... I am pretty sure it is the BC. I stopped taking it yesterday. I hope I go back to my healthy self from2 yrs ago. Please do not ignore side effects of drugs.