Yes, have received a few over the years in both eyes
Advice? Don't panic, they aren't as bad as you think they will be, they clean your eye, tape your eyelid open, insert a small spring between your eyelids to make sure it stays open, mark your eye where they will inject and do the job, obviously there are a few swabs of anaesthetic in there too
Side effects? You may have bubbles in your vision after it, you may not be able to see out of it properly for the rest of the day, it wasn't sore for me unless I forgot and rubbed my eye but it wasn't unbearably sore when I did so
Feel free to ask more questions
xx