Virtually every time I stand up I get dizzy and light headed, and feel like I could faint. My vision sort of fades when the dizziness hits, but it's normal again within 30 seconds. I'm also feeling very tired despite sleeping well, I've been getting a lot of headaches, I am always cold, despite having the heating on and wearing 2 jumpers. I also find it hard to concentrate on things, and quite often I become very aware of my heartbeat.
When I saw my doctor, i had my blood pressure checked - normal, with a slight drop when standing, I also had a bunch of blood tests - thyroid - normal, cholesterol - normal, electrolytes/kidney type stuff - normal, and I'm not anemic.
I'm 22 and have been having these symptoms for about 2 months, but the dizziness is happening more often and for longer now. Ps i'm not pregnant.