I am 38 years old, married, one child (15 yrs old) and not on birth control. I have a period every month, but its never "on time", usually early. Periods last anywhere from 5-8 days. My last period was 8/3. I have taken 2 pregnancy tests, both negative. Also experiencing discharge and leaking. However, I still feel like I do when I'm about to start my period. Should I wait or have a clood test?