Help, any ideas?

Adrian • Dream as if You'll Live Forever • Live as if You'll Die Today
So my period showed up 5 days late. I haven't been really stressed and it's super light with tons of cramping. Food tastes weird and my boobs (specifically my nipples) hurt REALLY bad. I had weird pinkish brown discharge the night before my period started which was odd. My acne is also going crazy, I've been super hot then super cold, and then super hungry then can't stand the thought of food. My boyfriend and I have had plenty of unprotected sex and thought I was pregnant. I took 3 tests and 2 came back positive but really faint. Does anybody have any ideas as to what the heck is going on?