I am So sorry to hear of your diagnosis & subsequent whirlwind of treatment & surgery @Sarnicad - but great news that it wasn't in the nodes. That's a good start.
It is always such a shock & like you, I was overwhelmed with tears, shock, anger - as I'd nursed my husband thru stomach cancer & chemo in 2010, so had a 'fair idea' of what was going to happen.
You don't have to tell everyone ..... to this day, there are some members of my family (step siblings) that I haven't told when I was diagnosed on Jan 5 - only tell those who will be 100% supportive of you and your family. Word will probably get out to the others with time - and by then, you'll have a better handle on things. It sounds like your hubby is doing a wonderful job of supporting you, so that is terrific.
Yes, sleep is often a casualty - so chat with your GP about alternatives to help you sleep. I find that wearing soft squishy earplugs helps me - tho I still have some crappy nights now & then.
As the lovely ladies have said above .... take a deep breath, take each day as it comes - try not to 2nd guess any of your treatment or get too worried about it (difficult tho it is!) Your medical team will be doing their best to get you back on track.
Some days will be good, some will be not so good .... we are on a tricky road that has lots of twists & turns. We've all been there, so ask away ANY question - someone will have an intelligent reply - and you can contact any of us privately just by clicking on our name & then click 'message' if you want to ask any questions in private rather than on the forum. That is also OK.
Thinking of you xxxx