Atheists, we've been together a while now... can you please explain WTF is wrong with me?

Lol. Explain that you meant that you can see how stressed and worried she is and you meant that you want it to start so she will be happier and you can both settle back down into normal life. Ask if she's worried about being pregnant, and say that you will stick by her no matter what happens. Don't try to get flowers or chocolate because she's likely to think that you have no clue about women. I hope I helped :)