myths or truths?

Everyone is harping on me cuz I've been doing stuff they don't think I should do. 
1- I take hot baths every so often. I can fall asleep easy but can't stay asleep and it helps when I take a warm bath. Is this bad or am I ok?
 2- eating deli meat. I love eating deli meat sandwiches and everyone says I can't have it. I even looked it up and it was a mix of yes and no answers. Good or bad? 
3- hair dye? Currently 26 weeks along. Wanna get my hair done in the next few weeks for my hubby's birthday. Last time I got my hair done I didn't keep it in very long at all and I was 2-3 months along then.