Hi there ~
I understand your concerns. While it is difficult to deal with a situation such as yours, the watery sperm or seminal fluid is not uncommon in these situations. I believe that you will do well with medications and after the period of medication treatment for chlamydia is over you will start to feel better. I hope you are going to be able to do so soon. If things do not improve and you are not having a satisfactory sex life, please consult a sexologist
or an andrologist for recommendations.
I hope this helps. Take care and have a lovely day!