Hello Christina
What you have experianced is a diabetic low as Type 1's get when they have a insulin reaction. I am not saying that you are a Type 1 as I think that your pancrease is overeating to the food that you have in the body.
Yes this will also bring on the insulin that the pancrease produces as your mussels go and do it's work will accept to what ever you just had so it would be good if you take some Orange Juice or a sluerpie will prop you back up when you go walking again.
Yes Terrie, Type 2's have a working pancrease but the trobble is the in the mussel where the insulin get's not accepted in the mussel but when you go walking then the mussel sees the energy and you are left with too much insulin hence the low dizzy spells that you are experiancing.
Christina, I would see a doctor and say what you have siad here also see an endocrinologist as your doctor can reconmend one.
better still just see an endocrinologist anyway.
Yes that also a symptom too. Good luck Christina.