For a short period of time you do not need medical LOA but like everyone said call in with whatever info you have asap. Make sure HR is informed of everything. Talking to the LOD is good but make absolutely sure that HR knows everything first hand. Meaning make the extra effort to talk to someone in HR even if you have to call back later to get them after talking to the LOD.
When I was hospitalized they gave me the ETL-HRs email address at work and I emailed her all the details, was able to ask questions, and kept in communication with her regularly until I was able to go back to work.
Get well soon... 🙂