I also threw up on doxycycline for 2 days into it I went to emerg and the doctor gave me a prescription for this very expensive anti nausea drugs then when I went to leave he actually noticed I have a nystagmus in my eye which was causing my vision to give me motion sickness. Also connected to canalithiases which is small particles in ur ear which also give you vertigo or nausea. Lyme can do some strange things that are hard to find meanings for. I deal with all of these issues and my most recent one is now vibrations make me noxious! I totally thought it was the doxycycline but had to stop fluconazole for candida. I am working on cutting down on my scripts with my doctor as with lyme my body is already processing n eliminating so many toxins that the extra load doesn't seem to help for me anyways. I find that I have brand new sensitivities to just about everything! milk and food and definitely no laying down. I got bad heartburn too and I found that making myself burp works too. kinda grosse but helped. Hope things get smoother for you. I can feel the frustration in your post. Take care