I am a fairly healthy 21 year old female who began work as a youth worker two months ago, which is a very active role. I subsequently lost 1 stone in the first month. I was a UK sized 12-14, so not considered over weight but certainly not 'skinny'. My eating habits had not changed and I was surprised to have lost so much weight but 3 weeks ago I felt very dizzy and blacked out. I went to the hospital and the doctor said my blood pressure used to be 130 but is now 90, he said this is due to the weightloss and I will probably continue to feel dizzy but it is healthy. I am a little concerned as I am feeling dizzy, thirsty, fatigued and not my self. I have also noticed that my appetite has dramatically decreased. When should my body start to get used to this newer lower blood pressure as I feel awful?