<human>: I'm [21/f] in a new relationship (~2 months) with my bf [28/m]. Things are going great and I think I'm falling for him. I've never felt so respected and trusted before, but now I'm worried that if I don't tell him about this traumatic event from a past relationship 1) it will come back to haunt me someday, and 2), even if it never does, I can't have a completely open and trusting relationship with this new guy.

The issue that keeps coming back to haunt me is that a few years ago (when I was 19) I had a miscarriage. I accidentally got pregnant whilst in my first serious relationship. I wasn't ready for a child and neither was he; that said, to this day, not even my parents know. I suffered from severe panic attacks after it happened and though they're infrequent now, I still get them on a less-frequent basis. 

I really like this guy and I want to have an open, honest relationship with him - no secrets. I don't feel that I owe it to him to tell him but I also don't know if I SHOULD tell him about what happened, given that it might be really upsetting (or unnecessary?) info to have about my past.

Can you give me a shortened version of the text?
<bot>: Unsure whether/not I [21/f] should tell new bf [28/m] about serious emotional baggage I'm carrying from previous relationship