Sick baby FTM

So me and my little baby our sick. She has parainfluenza which i think i have also.. we’re both congested have a little cough, she has diarrhea and a little warm. What can i do today/tonight for her to make it better..? Should i buy babyvapo rub? I’m not too sure what it’s exactly for though i just want her to sleep good tonight any advice ladies? And how can i get her stools firmer? And her cough down. I also used saline drops for the both of us and it didn’t really work 😷🤧🤒