14 weeks pregnant n blacking out?

I am anemic but they havent really stressed about taking iron pills because i also have Hyperemesis. I just got off the 24/7 home ivs about a week ago and now im just taking zofran when i need it, its proving to be very hard to stay hydrated AND eat right now but im doing my best. I have flinstones vitamins that my dr told me to take(2 a day is the same as a prenatal) i just got them yesterday...anyways im worried because im always blacking out and I cant even walk to the kitchen without geting very very tired, winded, and warm(feels like i ran lk 5 miles). is there anything I can do? anyone go through this or have any advice? my drs appointment is on the 26th so i am going to ask then but until then...is it something to really worry about?