Hello, I am a little thrown off by my body the past few months. 3 days before my period was scheduled to start I began a 5 day, oral steroid treatment. My period never came. After about 1 1/2 weeks of no period I took a pregnancy test and it was negative. I read online that prednisone can cause missed periods so I thought nothing further of it. However, the following month (technically now) and according to schedule, my period started but was very very light, one tampon, and stopped. I haven t taken another test yet and am trying to find anything online to support what my body is doing. Any help would be greatly appreciated before I call my obgyn. Thanks!