Anyone ever had this happen?

I keep having positive then negatives back to back. I’ve had 4 positive results and 3 negatives. Positive results are on blue dyes and the cheapies. Negatives are the same. What do y’all think? I had symptoms for a week June 26-July 3. That’s why I tested. I’m on Depo and the dr told me test because she thought I was. I haven’t called her back because I’m not sure whether I am or not. I have had extra discharge (egg white) nothing alarming but is this normal? I still nausea, headache and tender breast pain today