Swallowing

I’ve given plenty of blowjobs, but I never swallow... the new guy I’m with REALLY wants me to swallow! I’m afraid I’m going to gag or something very unattractive 🤦🏻‍♀️. Idk what to do!? I’m in my 30’s so it’s not like this stuff is new to me, but usually I use it as like foreplay and then we move into sex, but a few times when I’ve been on my period he’s asked me to swallow and I’ve chickened out. I want to surprise him. But I’m nervous! HELLLLLLP!!!!!!