I gave head 11 times within the past 3-4 days (same guy, he has no sti) and now it kinda hurts to swallow. Would u guys consider this normal/understandable or could there be a problem?

UPDATE:

Yes he gives me head in return, yes we had sex with a condom of course. He just really enjoys when I give him head and idk, it just sorta happened😂 11 is ridiculous so yeah I’ll give it a break for a couple days 😂 thanks for your advice!!