Hi,thanks for your questions. It sounds like you took the treatment as prescribed and so the chlamydia is considered treated. Its important that your girlfriend was also treated as a contact to you even if her test results were negative. It can be common for a urethral awareness to be present after a urethral infection and sometimes takes a couple weeks to clear completely. Unless you have been re-exposed to chlamydia in this time, you can consider yourself clear of chlamydia and able to have sex without worrying about transmitting it.
For more information about chlamydia please see https://smartsexresource.com/topics/chlamydia
Let us know if this does not answer your question or if you have any more questions or concerns.