Could I be pregnant?

WARNING: I did include a picture!

Lately I haven't been feeling myself. I've been really tired, have to pee a little more than usual, I am getting horrible acne and am having light cramping/lower back pain. My period is not expected to come until mid next week but today when I went to the restroom I noticed some pink and brown spotting in my underwear. HELP! I'm not sure if I may be pregnant or if I should be worried..

PS- It is not ovulation blood because I already ovulated for the month. My period is projected to start next week.