I actually had a similar experience during the spring. I was taking my psychology class online, so I was sitting on the couch taking a full on chapter test. Of course, they're timed so I was in full concentration.
My husband had a habit of coming in and talking to me while I was watching the televised portion of the class, but it's no big deal, I can pause it. It's annoying to be interrupted, but sometimes he gets excited about something and wants to share it with me.
Well during this test I felt a little pressure because there were some oddly worded questions that I had to reread (several times!). In walks the husband and starts talking - I "shushed" him and put up a finger-
Boy, you would have thought I flipped him off and told him to ef off! He was immediately not only hurt but totally ******. I told him I don't have time to fight, I'm taking a test, come back later and we can yell it out if he really wants. He walked to the other room and closed the door.
Later, he apologized, I apologized. He didn't know I was taking a test, so our reactions were quick and irrational. After that I made it abundantly clear when I needed an hour or so of complete concentration and it wasn't an issue.
As far as overall support, my husband is apprehensive. Although I am working full time now while taking prereqs he worries that my nursing school plans are part of some diabolical scheme to become a professional student for life, the permanent 30-something benefactor of his hard work (more like his daughter than his wife, etc etc)...
But, he knows that's not really true - it's just a worry and we all have them. I'm just glad he could express it to me so we can talk about how silly it is - I am working and saving money for that time period when I'll be in school. So, he's still apprehensive, but he's not unsupportive...