Hi and welcome to HCM!
Thanks for posting your query here.
The feel of the fly in your eye could be its sting or some of its body parts like wing. If it is so there will be continuous watering from the eye along with redness
. Its already 2 weeks past. Hence the chance of a foreign body in the eye will be very less.
You can continue with antibiotic eye drops. If still the feeling persists you can consult an ophthalmologist/ eye doc who will examine the eye with a slit lamp microscope. If any retained particle is there in the cornea- the black of the eye, he will remove it.
Hope this helps to you