Yes you certainly could've ovualted late. And might very well be pregnant. Some women don't get a positive pregnancy test until they are at least two weeks late! I would call your doctor and get your betas taken. It will be a quick way to end the wondering! Good luck!
There is a possibility that you might have ovulated later than usual. My cycles were usually normal until we started TTC. Whenever my period never came i would test and get negatives all the time. I had the same symptoms as you. My cycles have lasted 31 days to 41 days when i'm normally 28-29 days. So there is a possiblity that you ovulated later than usual. If still no AF why not go get a blood test just to make sure. Hope this helps.
You must have ovulated late, of course if we put aside the pregnancy factor. The days between your ovulation and period is called your Luteal phase and should be anywhere between 10-14days and is usually like clockwork. Your ovulation day can be delayed for many reasons such as stress, diet etc.. And is probably the guilty party. Sounds likenyour getting your period