Are there any free local clinics in your area you could qualify for?
That being said, stop telling your family unless you are about to pass out- obviously they aren't supportive and could possibly be jealous.
You may have a vitamin deficiency, are you taking any vitamins right now? If not, just add a multivitamin to your day, within 2 weeks you hopefully will feel a difference (try to find one with 800 IU's of vitamin D- you don't need anything pricey- Kroger sells vitamin for very cheap)
I'm also wondering if for right now your body is adjusting to the lower blood pressure, at one point my blood pressure was very low so I was always dizzy. I also had a vitamin deficiency. I ended up getting off of the blood pressure meds my doctor gave me and then started taking vitamins daily and it went away completely after a month.
When you lose a lot of fat you can also lose a lot of vitamins that were stored in that fat so it makes sense to start taking some just in case
Good luck- remember your family aren't doctors so let them talk! I'd have said "oh wait are you a doctor? No? Okay then..." lol.