hi, I have been having terrible headaches too some weeks ago. My headache can last for 2 days I was afraid to eat any medication during preg so i bear it, but when i check with my doc he says ok to drank panadol....then the week after that i got another one also last for 2 days.. i drank panadol on the second time i got this headache, hope that can wake up feeling normal...but turns out also still feel light headed and getting worse during the day then i feel useless to drink panadol..... the last time i got it again was last week, start by feeling lightheaded in the morning and worse at noon (thou already eat solid food alot), but near bed time my mother in law ask me to drink the bird nest one big cup then sleep.... and to my surprise i wake up feeling ok.... But still dont know is it coz of the bird nest? next time i got it again i want to try to drink bird nest, see what the result would be......i bought the Eu Yan Sang Bird nest around $49/box just in case...hehehe Maybe you can try consume bird nest too?...if its not working atleast bird nest actually still can give you good boost for pregnancy.... Good Luck!!