Hi I am 23 years old my last period was on Dec 23rd. 43 days ago I had some brown spotting on the 20th of January the day I was supposed to start. Starting jan 1st I started back up on doing about 2-3 miles a day on the tredmill. I have been kind of grumpy lately and sometimes in the mornings my stomach gets really sharp pains like I am going to start, but I never start. Hummmm. I have yet to take a pregnancy test cause I just keep telling myself I am late from the exercise, and I keep telling my boyfriend that too that is truly what I think. Could I be pregnant? What are your thoughts? :confused:

Take a pregnancy test -- its time to find out for sure.

Your situation sounds very similar to what happened to me. I too experienced the grumpiness and sharp pains, but never really felt sick or anything. Turned out I was pregnant. You should definitely take a test... or go to the doctors where they'll test u.