Cant get hard on after having Chlamydia?

Not chlamydia. Chlamydia and other STDs do not cause erectile dysfunction. If your problem with erections is connected with your recent chlamydial infection, it is strictly psychological, such as anxiety, regret over a sexual experience, etc. Discuss with your doctor or a sexual health expert. Good luck!
Yes. you can. Chlamydia does not cause erectile dysfunction. If you have erectile dysfunction talk to your PCP as there are many causes of that including functional and organic factors.