I recently gave oral sex for the first time and I swallowed, I thought it tasted awful but I didn't think anything about it. About an hour afterward my stomach started to hurt like crazy and it made me feel seriously ill for a few hours. Is this just because it was the first time or does this happen to some people often?
This also happens to me sometimes, if there's a lot of ejaculate and depending, I guess, on what he's eaten/drunk beforehand!
It sometimes give me stomach ache and heartburn like symptoms, partiularly if I have quite an empty stomach, am very tired or have been drinking either beforehand or the night before.
Don't worry about it - it might get better, you might learn to get used to it, but overall, you know you don't have to swallow - your partner shouldn't mind if he respects you, and particularly if you explain you would like to but it just upsets your stomach.
But, yes, entirely normal. Try it on a full-ish stomach and see if that helps at all.