shingles?

hi.

is it possible to have shingles and not blisters or leasons.i have a small rash on my abdoman but
this has been there for more years than i care to remember, but not all my life that i do know.

i have a point on my lower back , to the left thats very sensitive at times, but not all the
time.pain in my left leg, all the time, to the left of the knee cap and below is worse , numbness up
and down the left leg, pulses of pain occasionally

if i walk for any length of time, my left foot is totally numb.

i cannot sleep the pain is so great , i wake after just 4 hrs, and i have to get out of bed.

would a blood test tell if i have shingles?