This is likely a "floater" in the vitreous and is likely benign but can be associated with retinal problems so I would strongly recommend a full eye exam soon with an ophthalmologist. -RSR MD
There are often progams or free clinics you might qualify for especially if you live in a town with a teaching or university hospital. I would try and see an Eye MD (ophthalmologist) there. -RSRMD
I just lectured on this topic to dozens of eye doctors. These lenses don't work until the prescription has been adjusted to nearly zero. PRK usually takes weeks and weeks to stabilize in terms of prescription so, even though it's very difficult for you now, you'll need to be very patient and have a good chance of being happy with your result. -RSR MD
It depends on how large the pterygium is. Sometimes a good eye doctor can still fit you in lenses but they can worsen the pterygium. They can be removed if they are a problem and you might be a candidate for vision correction so you may avaoid the need for contacts. See an ophthalmologist who specializes in cornea and get an opinion on these issues. -RSR-MD
