Is it possible?

I took a test at 4:21 pm because I really wanted to test and the test looks positive. Looked positive before 5 minutes. The line has color. When you look at the test 4 hours later it’s still the same darkness and still has color. I took a test at 8:30 ish and it was negative. I’m 9 DPO. Why could this be? I took clomid 50mg this is my first time.