Hi Marjan,
I'm feeling that way too! I just moved into a new apartment after living in the same place for four years. In fact that's the reason I joined this forum, because I'm feeling nervous all the time and wanted to figure out how to overcome it. It takes time and the crappy feelings will fade. When I moved somewhere new before, sometimes it helped me to sit in a chair outside my building, just take everything in, watch people walking by, etc. for a while before going out.
~E