A scan (if you get it done the same day) will be a faster way of finding out. You said you have another blood test on Tuesday right? That will tell you as well but obviously you have to wait for the results.
I think it's ok to stay home tomorrow and see a dr, you've been through a lot and everything else will manage or be able to wait.
Do you have anyone to talk to?
Eta: I think meredithgrey suggestion is great.