Testing question

Most of the time I have irregular periods, sometimes somewhat normal. My last one was 35 days & I tracked ovulation. I had positive opks, but that doesn't always mean you're ovulating. If I have another 35 day cycle, I would start on feb 2nd. I want to take a pregnancy test in the a.m. but I'm so scared. I know I should wait for a missed period, which would be Monday, but since I'm irregular I could go 3 months without a period. I know why I get them, I've been to the doctors. I just don't want to take a test in the morning & it be negative. My husband and I have been trying for 3 years. Would testing tomorrow be to early?