Hello dear
Warm  welcome to Healthcaremagic.com
I have evaluated your query in details  .
*  Though it is not on medical records , still one can have any of the new
    or unknown outcome to any of the material from exposure to the body ,
    there is where the miracle of medical sciences are .
*  If  you notice particularly after every semen swallowing this issue , 
    means that either your intestine is not accepting it or in some cases 
    psychological 
stress also plays role in that .
Hope this  will help you for sure   .
Wishing you fine recovery .
Welcome for any further  guidance .
Regards  .