The way birth control works is that is keeps you from ovulating. So, there really is no "better time" to have sex than others. If you're talking about doing the cycle/rhythm method on top of your birth control, I don't know your cycle to give you tips on that.
If you take it on time every day, you should be fine. Any time you have sex, there is a chance for pregnancy. But, you are pretty protected without a condom at all times. I wouldn't call you "overparanoid," just super safe. But, you can take it down a notch and just be "safe."