I just had a panic attack at work

I was in a meeting with a potential client where I was supposed to present a couple sections. I've got some really stressful stuff going on at home, and I didn't feel very well prepared for the meeting. I couldn't stop shaking and felt like I was hyperventilating. I also completely sweat through three layers of clothing. When it came time for me to present I completely choked and didn't know what to say. Luckily my team covered for me but now I'm sitting outside and I don't know what to do. I don't feel like I can go back inside and face people at the moment. I don't think anyone knows what happened, I don't know what to say.