If you get chlamydia in the rectum through anal sex, is it possible for ir to also infect the penis/urethra? or will it just stay in the rectum?

Here are some...: The described scenario poses high likelihood to infect urethra also. So, seek professional evaluation, treatment, and counseling timely if symptomatic & concerned. Of course, make sure of treating and following partner as well. Best wishes...

Can go to penis: Have partner(s) checked and treated also.

Yes: All areas can be affected