Weird spotting

I thought AF had graced me with her presence Dec. 1st during intercourse. It was pinkish in color. I put a tampon in thinking it was her, but when I took it out, there was barely anything there. I inserted yet another tampon just in case, and again, nothing. Today, Dec. 4th, I began experiencing brownish discharge but only when I wipe after peeing. I'm also having cramping on and off. My period is very regular so this is kind of making me crazy! I'm trying my best to stay calm and be patient to see if she, AF becomes a bit heavier before I say anything to my boyfriend or take a hpt. Has this happened to anyone else? What do y'all think is happening to me? Help, please.