This is driving me nuts. My cycle is not regular by any means but my cycle is usually on the short side 24-26 days....last month 31 days and now this month I am going on 35 days. I have been using OPKS and only have gotten 1 positive in the 4 months I have been using them. I feel like this is consuming my mind and every morning I take a dollar store hpt only to get a negative. At what point to I go to the Dr for blood work or is there something else I should do?