Toddler refusing medication

I have a very very stubborn 2 year old daughter. She’s been picky and stubborn literally all her life. She’s a terrible eater and I’ve tried everything. ..

Now she has a pneumonia and won’t let me spray her nose with saline spray, won’t let me clean her face, and is refusing the nebulizer .... ive literally had it. I don’t know what else to do I swear I can’t wait till she’s 18 and is independent. I feel so mean saying this but she is literally driving my husband and I mad...