A.
Assuming you have regular 28-day cycles while on the pill, I think it's highly unlikely that you're pregnant. If you're still 10 days from a period, you're only 18 days into your cycle. If memory serves, it takes a good week for the embryo to implant in the uterus and for your body to start producing the pregnancy hormones which trigger pregnancy symptoms and provide positive pregnancy tests. That said, I think you would have had to have conceived at about day 10 or 11 of your cycle, which is extremely early. You might take a test now and in a week to calm your nerves, but I bet you're in the clear!