pregnant and breastfeeding?

I fainted at a conference today - my husband and I traveled by plane to learn more about my son's rare, non-hereditary disease.
After I came to, only my pride was hurting! I was so embarrassed and feeling better. EMTs came and loaded me onto a stretcher anyway, insisting they at least take my vitals.
In the back on an ambulance, the EMT asked "How are you feeling? Everything normal? Is it possible you could be pregnant?"
"No, no...I don't think that's possible."
My vitals looked decent and I went back to the hotel to rest, but I was restless. Could I be pregnant?! It took over a year to conceive my son, who is 10 months. 
Well, I hit cvs, peed on a stick, and it looks like it could very well be that I am expecting. Holy. Shit. 
My question is...can I still breastfeed? I am an exclusive pumper, but I was hoping to make it to a year! 
WHAT A DAY!!!