Stomach pain after swallowing semen

Yes. I have no idea what is happening though.

Worth you both getting checked for possible infections and revisiting your hygeine regimes...

There is nothing normally contained in semen that will cause this so if everything else is ok you are probably developing an intolerance of his semen in the same way as anyone can develop an intolerance to just about anything...
Cheese, peanuts, cornflour...

Possible something you have seen or heard has caused you to develop this reaction psycho-sematically.

I suggest as you seem to be spoiling your boyfriend somewhat by swallowing his semen so often, which seems unfair to the rest of we poor mortals, unless you really crave this practice you should give it a rest in case it should develop into a full-blown allergy or until you have discovered more...

If you really must continue I suggest you do it only when you wish to reward your boyfriend for something extra-special.
Why should your boyfriend have so much good fortune?

With a little practice you could learn to spit discreetly in a lady-like manner, though even this might not be good for you.
I understand condoms are available without teats in some places for the purpose of oral sex...

Good luck!

Then don't swallow it...Spit it out....Take care...

Caroline

Try eating something acidic before you swallow. I've noticed that my boyfriend has particularly basic semen, which can give me a stomachache afterwards. Eating something acidic always helps me.