Advice on backache

Hi everyone, currently 33+1 and backache is definitely taking its toll on me last night/today! Do you have any tips that I might not have considered yet? I sleep with my preg pillow, I’ve had baths, hot water bottles and walked the dog to see if it eased things up. Whilst I’m active it’s hardly noticeable, but as soon as I come to rest or get to sleep it’s like a really really irritating niggly ache soemtimes in my shoulders sometimes at the bottom of my back. Please helpppppp!!☹️☹️☹️