It sounds like you really love her. I am sure this situation is very difficult for both of you... I have been through the same. She needs your acceptance and suuport now more than ever. Keep your freaking out to yourself and dont tip toe around the issue... she will feel like you are isolating her and judging her. Go and take her to the clinic - then go for ice cream and a walk afterwards - something together, intimate and yet innocent. Hold her hand and dont make any sexual advances toward her because she needs to know that you are there for her no matter what - not just for sex. She is very vulnerable right now - but you also need to treat her with respect and like she is a strong woman who can face up to this ugly thing that happened from no fault of her own. Take it from me, she obviously wants your help to overcome this... or she would not have told you.

That is my advice - I wish my man was as supportive as it sounds like you are.