Spot of pink and blue color spreading from corner of screen

I don't remember exactly when the color appeared but I know I've dropped the phone a few times. The color started as a very small pink blot. Over time, the color deepened to deep blue and spread out with pink edges. I thought it would stay at the corner but it is slowly spreading and I'm concerned that it would soon start to seriously affect visibility.

Where I live, repair parts are hard to come by. A friend with an A52 had to pay an exorbitant amount to change their screen in order to fix a black screen of death issue it had and I'm worried I'll have to pay that to change my screen. Does this sound like a screen problem? Is there any way I can keep the spot from spreading more?