Hi Toni!
Boy, I can relate! And all that we want to do is go have fun, enjoy the sun and hang out like everyone else...........I know that the heat has alot to do with it. You have been given great ways to beat the heat, so I won't go there, but what about a wheelchair? You may be able to borrow one for today. I know it is embarrassing, but it really saves energy. My son graduated from college in May and it was really hot. I had to walk a long way and that wasn't going to happen. The chair took a while to get used to, with the stares and all, but it was great to have energy to spare! You don't have to use it all the time, but just for "special" occasions when you know that you need it. Or if nothing else, drive as close as you can and take a chair to SIT!
As far as the cop, maybe you should send him some info on MS. People can be so incredibly rude, but for every rude one there are about 50 door holding, grocery carrying, smiling, caring other ones out there. I have to keep reminding myself of this everyday!
You have been such a positive person on this board and I'm sorry that you had a horrible day. Sometimes, horrible days make me so grateful to wake up to a better day! Hang in there and be smart in the sun!!!!!!!!!!!!!!!

Take care! Barb