The world hates me

Okay so I have this constant irrational fear of getting pregnant even though i am a virgin and am on the pill. I have never had sex before and I make my boyfriend wash his hands and use the opposite hand to which he touched me to the once which he touches himself, just so I cover all the basis. But everywhere I go it's like the world wants me to see something to do with pregnancy. Adverts, people, TV shows, movies anything at all. This is worrying. But just to make myself stop worrying I can't be pregnant can I? There is no way. I also currently am on my period, just started today.