I’m so angry at my friend for being sick. I wanted to take her out. Am I right to be angry?

I had some plans to surprise my friend with dinner and going to the club today, but she texted me and said she ended up not feeling well. She said she had a headache and nauseous. I told her to just take advice or whatever. The dinner and club wasn’t reserved but I wanted to take her out. She is always working, doing schoolwork. She never gets out to have fun. Nauseous and a little headache is no reason to stay home on your birthday. She called me up and said she still isn’t feeling well so I scolded, “All I wanted to do is spend time with you and you’re going to bail just because of a little headache and nauseous. I mean you should stay home but I really wanted to spend time with you! Happy birthday. Thanks for NOTHING!” And hung up. Headaches go away.
She said I made her feel bad and I told her, “NO. You’re making yourself feel that way. Stop feeding sorry for yourself. You could have toughen it out and celebrated.”