My doctor switched my pills from Seasonale to Femcon 35 due to continious bleeding on the Seasonale. I am supposed to switch back to the Seasonale after taking the Femcon for two months. Last month, I switched the pills mid cycle and I never missed a pill. I did not have a period on the placebo pills of the first package of Femcon. I called the Dr. she said to take a hpt. It was negative, so she said it was normal not to worry about it. I am concerned that it was too early to test. (Only 5 days into placebo week when I tested). Should I be concerned about pregnancy? Also should I use protection when I go back on Seasonale because of the different estrogen levels in each of the pills?