Welcome to Just Answer and thanks for your question. It can be low blood sugar, dehydration, vasovagal syncope, or a panic attack, among other things. There really isn't any way to give a diagnosis without testing.
Probably not. Stroke usually involves one-side only problems.
Anemia can cause general malaise and lack of energy, dizziness on first standing, etc., but it doesn't cause numbness.
It won't cause numbness, blurred vision or sweating.
Hi i had had a spell where i got burred vision for a few second and my body felt numb and i started to get really hot do you know what this can be?