I’m late

I had my IUD taken out in May, and finally started my cycle last month. Of course, I was waiting for so long so I took all the necessary test to figure out when I’m ovulating. Well I am 3 days late and am still getting negative pregnancy test, also when I used the ovulation test I used it from the end of my period to the start of my next period, and it never said I ovulated. I have been trying for 5 months now, and it’s really starting to get to me. I know many people have been trying longer, but it still isn’t a good feeling... Anyway I am starting to think that the tests I buy are broken lol, I just wanted to ask if anyone has any suggestions. I take vitamins and work out and try and stay really healthy, but apparently it isn’t enough. So if anyone has any other ideas please let me know!!