What are some of the common side effects of stopping birth control and how long do they last? I feel out of it and super drowsy. I stopped the birth control on Thursday. I have been feeling off since like Monday. That is when I started taking 20 mg of belsomra which is a really dangerous sleeping pill as I found out. Im back down to 10 mg of that. I do not know whats making me feel so drugged and just sick.