BD,

Welcome to BB and congrats on your pregnancy. Sorry to hear that you are so allergic to many painkillers. I can really understand the torture of these headaches. I remember mine were so bad some days that my DD just sat and wondered why I was looking so grumpy! LOL, she must have thought it was something she did. Thankfully, they are gone now. Lying down surely helped and for me it was also dehydration. When it gets uncomfortable, you could also try to drink a decaf green tea which helped me. If you think caffeine withdrawal is the reason to your headache, I guess you could also have a cup since they say that pregnant women are allowed to have 2 cups of coffee... so, a cup of it could ease yoru headache! Hope it goes away for you soon....