Homesick?

I oddly became a little homesick today.  I have been pretty bored and rather fed up in the last month or two, but I have not really experienced homesickness.  However on the way to work this morning, I was sat on the bus and listening to some music I haven't heard in just over in about 7 months, which took me back to the very beginning of my experience out here.  Then as the bus moved past a sort of construction yard I saw some mundane pieces of scrap metal and for some odd reason it made me think of the UK.  Then feeling fell away rather quickly, but it was very odd.