Ovulation

I been trying to conceive for 4 yrs now I already have 2 beautiful kids, so I been testing my ovulation my ovulation date was the 8th of Monday came back + so I just took another ovulation test it’s 3 o’clock in the morning and I get + it’s going on day 5 of straight + on my ovulation test so I decided to take a pregnancy as well and of course it came back negative, from the 8th-13th opk been + has anyone went through this if so all opinions are welcome just trying to figure out what’s going on