so many things wrong with the information in this post. lets try & hash it out:
if you *dont* have an eye infection, then why were you prescribed antibiotics for your eye? that makes no sense. antibiotics are for bacterial infection only. not "colds", etc. either you DO have a bacterial eye infection, or the drops you were prescribed were not just antibiotics...they could have been combo antibiotic/anti-inflammatory. confusing to me what your opticians/docs are doing.
no, the "cold" is probably not related in any way to the red eye. IMO a red eye in a contact lens wearer is 99.9% of the time b/c of the contacts. and again, why are you on antibiotics for a "cold"? by definition a "cold" is viral. antibiotics dont work on a "cold". so you either dont have a cold, or your doc is rx'ing antibiotics somewhat questionably.
here's what to do about the red eye: go to an eye doctor if you have not been to one yet. not the optician, not a "
regularRegular insulin" doctor.
It took me 50 years to find out-the name for it ankylosing spondylitis.
Pray you don't have it