removed the ring 2 days ago, and am still waiting?

I am currently using the NuvaRing as my birth control method. I was on a study abroad trip out of the country for two months, so took two rings with me. I read in the directions that it is ok to leave them at room temperate, instead of refrigerated, as long as it is not for a long period of time (many months or years). I only had it at room temperate for about a month and a half, but left it in the drawer in my bedroom, so it did not receive any real direct light to warm it up. I just started the NuvaRing in February. The first month, I received my period two days after I removed the ring, and the same with the second month. The third month, I was not sexually active and got my period the day I removed the ring. I am home now and have been sexually active. I removed the ring 2 days ago, and am still waiting for my period. Is this normal? I am getting worried - help!