Same cycle schedule

Tomorrow is the last day of my fertile window and me and my husband to be have had sex every night except the 11th. Last night was the best day to have sex and also is when I should have been ovulating,but I took the test and the line was barely there but on the 13th I took one and it was pretty much as close as it could get to positive. My period is due the 27th but I'm hoping it's doesn't show. Is anybody else on this same schedule and willing to chat with me. We are trying to conceive number 4 we have two boys and one angel baby