My problem is I do not see wet dreams

As-Salamu `Alaykum (Peace be upon you).

I suffer from a permanent psychological problem which is not seeing a wet dream. I started to feel a little bit worried about it because my age is 19 and all the signs of puberty age appeared except that one. I do not suffer from any problem, do not have any hereditary disease, or any disease in urinary tract, moreover I do not use any medications or tranquilizers. Thanks are due to Allah, but taking into consideration that I have seen dreams but without ejaculation.

I hope that you consider this problem because it caused me much worry, particularly I know many people in my age or even younger who always see wet dreams. I am waiting for your answer, and thank you in advance.