I've had a fever for a week now and I have been taking either tylenol or motrin every day, sometimes multiple times a day (this was during my placebo week). I just took my first birth control pill of the month and I had spotting the next day, which is very unusual for me and I've been consistently taking the birth control pill for 7 months now. I was wondering if there could be a possible interaction between the motrin and tylenol and my birth control to cause this spotting?