TTC baby #2

TTC baby #2. I am 4 days overdue for my cycle. I took an at home pregnancy test yesterday & it was negative. This morning I did an old fashion way to confirm pregnancy by doing the sugar/urine test. It says positive. Not so sure how accurate it is. I bought another at home pregnancy test after work today and came straight home to take it. Results still showing negative. How long should I wait before taking another at home test? This is so frustrating grrrr