Do you have more ovulation tests? If so, take another test in a few hours and see if it's still positive, if it is, definitely have sex tonight! The way it works is you count your cycles from the day you start your period until the day before your next period, after a few months you'll know just how long your cycles are. But you can buy a cheap 20 pack of ovulation strips for the month. The day after you stop your period you can start testing once a day. It's best to test in the afternoon between 2-8pm, hold your pee for 4 hours and don't drink within 2 hours of the test. About half way through your cycle you should get a positive (but not every woman does half way through their cycle, so make sure you test every day!) Good luck hun, if you have any questions send me a message!