hope you feel better soon
i know how hard this is. Yesterday, 3 of the 5 food items that i have been able to keep down have revolted on me and now i'm forced to try new things. I tried the seabands, wear them a lot, they help a little. I tried b6, which did nothing but make me gag as the pill itself had a nasty taste.
My BP is always very low, in general. about what you posted is the norm for me. same with body temperature. If it's not a normal status for you to be in that range, you'll definitely feel it!
One trick I learned last time is if you start to feel nausea or feel dizzy, it helps to run cold water on the inside of your wrist. Or put your head in the freezer and breathe some cold air, sometimes that helps me too.
If you haven't yet tried it, I'd get seabands, keep crackers by your bed. Another thing that helped me, and I hate to do it but it's a class A drug, is diphenhydramine (Benadryl). My doc says its ok, and i know some women try Unisom. I've had horrid allergies with the pollen the last few weeks and was taking diphenhydramine and because of preggy-brain i didn't notice that when i took it, food stayed in me longer. Last night I took one, ate a few pretzels and they stayed put, and this morning when i got up i took one (bottle says one pill every 4 hours, I do like 1 pill every 8 or so), ate a few crackers in bed, and for the first time in a week I am not worshiping the porcelain god first thing in the day.
Good luck! I hope your diziness subsides soon. Another thing that helps if you can stomach it is juice, like OJ. hth.