So this is my first time posting idrk who I’m posting for but I need answers!!

Some backstory- my husband and I haven’t been trying hard for a baby more like if it happens it happens for almost a year now. However two, two and a half months ago I started tracking my ovulation, trying harder than normal. Since then I haven’t had a period but when I take a pregnancy test it comes back negative. I always take the test at night could that have something to do with it. I don’t have any signs other than random spits of nausea but idk I feel like that’s normal for me. Please help!! Has this happened to anyone?