Thanks to everybody for all your responses. Lots of good ideas. And, you are all singing from the same hymn sheet - ie. keep using mental techniques etc. and find other ways to keep walking.
Suppose it is like the saying, "if you need to ask the price you can't afford it" in that if and when a wheelchair is essential I won't be asking the question. Think I had had a particularly bad day!
Ian - think I will go to supermarket at night, when fewer people. It is open 24 hours! Trolley is a help until I need to turn a corner, then I tend to freeze. If fewer people in shop should be able to make bigger sweeps around corners! Realise part of the extra stress was that they had moved all the goods around (grrrrrrrr) so I couldn't go straight to my regular purchases.
I know what I need - a big lollypop sign to stick in the trolley, saying
I WOULD LIKE TO GET OUT OF YOUR WAY BUT I CAN'T.
BLAME PARKINSONS NOT ME !
Eileenpatricia - yes, laser lights are helpful. But, not at that price. I use a laser pointer, like lecturers use to point to screens, costs only a few pounds and goes in ones pocket.
Really liked TED talk video -Thanks for that link. Not sure where to get an " illusion stair rug " from, but intend to draw up and try out a simple cardboard version.
Billywhizz - thanks for that. I certainly need a house-trolley of some sort as I can't carry anything and walk at same time.
Gus - I first noticed slightest movement hesitation 3 years ago, summer 2013. Took about 9 months to convince GP and get neurologist referral. Started Madopar April 2014, DAT scan confirmed diagnosis October 2014. Had actually had handwriting problems since 2011. Seems to have been very fast development to me, and huge increase in medication needed. Take Madopar 100/25 every 3 hours during day, with Entacapone, sometimes need it very 2.5 hours. If I go really off the next dose does not kick in properly. Use Madopar dispersible when needed too, usually 2 a day. Also a 100CR at bedtime and another one during the night as last only about 4 hours (stops restless legs).
Good reminder about heel walking. Thanks. Mindfulness is essential with PD !