Try soy milk, it comes in flavors too (vanilla, chocolate). Covered by wic (if you inform them). Doesn't taste bad with everyday foods (cereal, cooking, etc)
Lactose Intolerance can be triggered mostly by either not having milk for long periods of time, or having alot of milk for long periods of time.
I know when I got pregnant milk would make me feel sick to my stomach and I used to be able to drink it now I can barely eat it with cookies lol
Your baby could be in your back that's what I was told... My little one is in my back which is why they say I have a small belly...idk about the milk I know I can't drink as much as I like now that I'm pregnant maybe because I drink 2% now thanks to wic lol but I usually drink whole so that could be the issue
Not sure about your tailbone pain but i know that some people just cant stand milk during pregnancy and throw it up. Usually being lactose intolerant would give you diarrhea.