Panic attack feeling guilty and isolated

Hi, I’m having a panic attack right now and feeling so trapped. For context I’m at my partner’s parent’s house and all his family, siblings, their partners, his grandparents are all downstairs chatting making a lot of noise. I knew when I woke up this morning that I was going to struggle to go downstairs and have interactions with people but I was building myself up to do it. It’s just resulted in so much anxiety, crying and now feel completely unable to leave the room. I asked my partner to just tell them I’m not feeling well but I’m overwhelmed with guilt at not being present and hiding up here. I’m just writing this here because I feel very isolated and want to talk about how I’m feeling with people who might understand. If anyone has any advice on how I can leave the room without breaking down in front of everyone it would be appreciated.