I am currently TTC. My periods are not exactly 28 days apart. In fact one month it may be 29 days, the next 33 days. I figured the average is about 30 days in between. I've taken 2 pregnancy tests one on day 28 the other on day 30. Both were negative. Are my periods considered irregular? I get them every month but just not the same day each month. How much longer should i wait to take another test.