Ya, no. That's not a situation that will result in pregnant. If you worry about this a lot and are a bit fixated on it, what about talking to your doctor about anxiety? Good solid birth control as Anniebrooke mentioned is a great idea but also, working on the root cause of anxiety may change your life in a positive way!
a) If you're worried, take a test, but it's hard to see how sperm could have even reached your body with all the precautions you took.
b) I looked at your other posts, all of which included scenarios pretty far-fetched that might cause pregnancy one in a million times, and it seems like you're pretty anxious about sex or getting pregnant. Are you sure you don't want to go onto the pill or get an IUD? Or to just stop having sex?