Is NOBODY wrong in the post ? POST : Hello, everyone.

I (22M) met my girlfriend (29F) online a few months ago. In our first date, I went to her house and eventually we started to made out. 

A little background: I had a trauma in my past so I'm so afraid of getting an STD such as HIV. I tested multiple times over a long period and I developed a severe anxiety disorder. 

After we made out, things were going to sex. I stopped her and mentioned about my situation and I'm afraid of having sexual intercourses with someone I met recently. She listened my story and said that she understood and she will have an STD (I specifically asked for HIV) test in order to continue our relationship. I said okay.

Next day, she texted me and wanted me to send laboratuary informations to get tested. I sent her and then she asked me about what she will say to get tested etc. Then suddenly she said "You know what, let's not do this and break up at the first place" I completely freaked out when I saw this. As I told you, my anxiety makes me feel worried even in a simple situation. I start to face panic attacks whenever I face a situation like this. I asked her and insisted to learn why she gave up and eventually she admitted that she has HPV. 

I wasn't mad at her but I freaked out. Not because of HPV but she hadn't been tested for any other STDs and as you know, once you get an STD it is easier to catch another one as well.

I meet her again and convinced her to take test. (no pressure, just talking) She had tested for HIV and result came out as negative. We continued our relationship but I found out that she has been in a one night stand (unprotected) recently before me. So she might be her window period for testing. I talked to a couple professors and they suggested her to get tested again.

Now, the problem is, it has been 3 months and I'm afraid to ask her again to get tested again. My anxiety kills me everyday because of this but I cannot mention about this to her.