I apologize that no one has responded to your question sooner. Different experts come online at various times. I just logged on and saw your question. My name is ***** ***** I’m a biologist with a special interest in bird health. I'm sorry to hear of these problems.
Repeated egg laying is very hard on a female bird. If no male is present, the eggs will not hatch, but it still depletes her body. It would be good to try to stop the egg laying.
It can help to provide lots of toys and interesting things to do in her cage. Give her only part of her toys at a time, and change them every week. That way, they'll always seem new.
The American Cockatiel Society recommends removing some of the stimulus to mate and lay eggs. For example, limit the amount of daylight your bird is exposed to so it seems like winter, rather than breeding season. If her cage is in a room that is lit at night, move to a darker room or cover the cage. She should have 14 hours of darkness every day. Keep her cage where she can't see or hear birds that are outdoors. Change the location of the cage frequently. You can read all of the recommendations in detail at the Society's site:
The steps above may help with egg laying, but the other problems are going to require an avian vet's help. There is one in India. If that one is too far away from you, the vet you presently see can call them for a phone consultation. That way they can figure out the best steps to take.
DR.YUVRAJ KAGINKAR, DIRECTOR
MYVETS 4 PETS
SHOP NO- 2, BAWA TOWERS
NEAR NARAYAN NAGAR
MOB :-(###) ###-####/p>
Dr.Shivani Tandel(###) ###-####/p>
Let me know if you need anything else. I hope your bird will be fine.