I am 5 days late for my period. I don't have any PMS symptoms and no obvious pregnancy symptoms. I was spotting brown (which is old blood) on July 14-16 and missed my mini pill from July 7-10. I have taken 2 pregnancy test and they both came back negative. This is starting to drive me crazy. Somebody please give me some suggestions as to what could be going on.

Missing your pills may be what caused the spotting. Get back on track with your pills and see what happens when you would expect your next period. You can always try another couple of pregnancy tests over the next few weeks, just in case, and it will likely ease your mind.