I doubt they will fire you when you return. If you were to sue it sure would look bad on their part.
I would make sure you have all the paperwork filled out and copies with you.
Also, Call HR and let them know your supervisor has not responded. I am in HR and I usually deal with the people out and then I contact the Supervisor letting them know any restrictions the employee might have.
If your Dr released you to full duty then I would go in at your usual time. if the Dr said restricted duty then you can call HR and ask if you can be accomendated with the restrictions...
I hope all that made sense, I am at work and typing fast :)
Diagnosed w/ Crohn’s Disease March 2007 Started Humira June 2008 (have been on other cd meds)
Diagnosed w/ Fibromyalgia May 2007 also on Soma
Diagnosed w/ General Anxiety Disorder in 2005- Effexor and now new med Clonazepam starting 7/18/08