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1.The history and symptoms suggest possibilities of ejaculatory ductal dilatation / obstruction.
2.It also can be the psychiatric disorder of thinking - one of the possible cause. Which needs
counselling.
3.But in this case need to evaluate the cause - an
ultrasound examination of the scrotum will help to evaluate the cause.
4.Ultrasound will help to identify any testicular pathology, its blood supply and chord and thickness - which is seen in case of any obstructive pathology.
5.For the seminal vesicles - actually
rectal examination of
prostate gland will be needed.
6.However i would recommend to see an
urologist, and get examined and investigated throughly and treated accordingly.
Good luck.
Hope i have answered your query,
any thing to ask ? do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888