Last month I had my normal period at the beggining of July. I was not sexually active then I had another period two weeks later in the middle of July which is irregular for me. This month I have been sexually active, but one month from my last period would have been the middle of August, and still it has not came and it is the 27th. I took a pregnacy test and it was negative. Could it be that my body is trying to get back on it s regular cycle? Or am I pregnant? I ve also had a decent amount of stress but I did not beleive it could make a period do something as radical as this.