Need help identifying this fungus on my Cattaleya orchid!!

[Cattorchidsaremyfav123]

The second stem looks a little bit shriveled and the one third stem has black on the lower part of it I’m not sure if you can see it in the picture but the website will not allow me to upload anymore pictures to the website. If anyone could help me identify this issue and if it is a fungus is there a way to fix it ? There seems to be new growth but I’m worried it’s just going to end up becoming infected everywhere.. please DM me and let me know your thoughts! Also if anyone has any ideas where to buy some afforadable orchid plants or if they have any for sale let me know I am a new orchid caregiver and I’m inn love with my orchid but I have yet too find a place in my town that sells orchid seeds or cuttings! Thank you guys so much and I really appreciate the help!