I think you have to weigh up the risks and benefits for each situation. Did your oncologist give you info about when your white blood count will be at its lowest? For me it was from about day 7 to 14. I used to avoid crowds and close contact with others during this time. I also was almost religious about hand washing!
Despite this I too ended up with an infection and had a 3 day hospital stay after my 4th chemo. My oncologist said that often we are more at risk from bacteria on our own bodies rather than germs from others (urinary tract infections, infected wounds etc) but I still felt more comfortable avoiding public places during that time when my immune system was struggling.
Even though it seems like forever in reality chemo is only a fairly short time. There will be plenty of opportunity to catch up with people when you are finished treatment and not at risk of life-threatening infections. People understand. Hope that you have a better run with the rest of your chemo. Hospital stays are not fun! Take care. Deanne xxx