nervous wreck

I was diagnosed August 2005, wle, snb and rads and am currently on tamoxifen. Thought i was moving on quite well and haven't been on the site half as much as i used to. I went for a follow-up appointment for a problem i've had with my foot since before my diagnosis. I was scheduled for surgery on foot just as i was diagnosed so it was postponed until i felt ready (who wants to have surgery????). I contacted doctor at hospital last november and finally, after having numerous appointments cancelled i saw him on 5th march. During the examination he found a lump in my other foot and since then i can't seem to function properly, even though he told me it was probably fibroma (apparently harmless!!) He requested an ultrasound which i had on monday. The scan showed it isn't this fibroma thing and had to have an urgent mr scan which they did that same day. Am now waiting for the results and am imagining all sorts. Am i just being over dramatic or is it normal for me to be thinking that the dreaded thing has invaded somewhere else in my body? I know my family are worried because no-one is actually saying what they are thinking. I know no one can put my mind at rest but at least i've said what i'm thinking!!!!!!!