Morning sex

We had sex this morning, I think that it is too late as I think I ovulated last weekend as I had some spotting for a day but you never know. I have only just come off the pill so i am not regular at the moment and I don't know my cycle length so I can not be sure when I ovulate. Think Im just clutching at straws though. Cant wait to get my period if I am not pregnant this month so I can start using my fertility monitor as the first day of your period is day 1 and it has to start from there. Unsure however how I am going to be able to test my urine every morning without my husband noticing!!