Why is my ovulation test coming out positive a day after my period ends?

ok im so confused on the 5 I had a positive ovulation result but on the 6 I got my period now my period ended yesterday so I tested yesterday it was negative now I test today and its positive u will see that clearly the test line is darker then the control line.....so what's wrong oh my doctor told me I have pcos but after I had a miscarriage he said my cyst were alright?the instructioon said that the condition pcos might affect the results but since the doctor gave me a sonogram and said everything was alright I thought it wouldn't matter?