M.R.
Do you think you know when you ovulated OR do you know when you had intercourse with your partner that could have possibly been the conception event? Without having a menstrual period, you don't really have a lot of evidence so you may wish to wait at least 10 days from the 'time of sex' to test.
Or, if you just can't wait...buy a double pack and use one tomorrow morning and if it is negative then wait at least 10 days before testing again.