okay so i have just got done takeing the last pill to 3 months of norinyl 1+ 35 and i just started getting the side effects like head aches, chest pain, and i guess shorter peroid. but my peroid wasnt short the first 2 months of taking it and when i have sex i always use a condom and its never broke or anything but im really freaking out could i be pregnat? one of the things that could make it less effective is tylnol and i take it and so im freaking out!!! please help