Negative ovulation test

So my husband and I have been trying for 2 years. Everything seems to be “normal” I didn’t want to do it before but I tried the ovulation tests. Followed the instructions but they are always negative. I have an electronic one so it reads positive/negative and the numbers. I might be doing it wrong for every time it comes out negative. It’s really discouraging and it just makes me more upset than how I am. Any suggestions? Should I stop? Should I try another brand? I really don’t know what to do anymore