Discomfort after inseminating

I am inseminating at home using fresh donor sperm. I use a needleless syringe and I don't think I put it in too far as it isn't uncomfortable when I inseminate. However, in the few hours after, I sometimes feel discomfort, like a painful ache around bikini line sort of area. My donor has no sti's or anything and neither do I. Am I doing something wrong?