44 Day Cycle??

So I am currently on day 44 of my cycle and no sign of AF. I took two pregnancy tests in the last week and both negative. My average is around 38 days and my longest, besides this one, is 41. I don't have endometriosis or PCOS that I know of or any other medical issues that would hinder cycles. I am not on birth control and haven't been for a couple years. Is it maybe too early to test? I'm not even sure what DPO I am because I am so irregular. If anyone can answer that question for me, that would be great. My last menstrual cycle started on the 4th of February. Any help would be appreciated. Thank you!