Please help!! Don't scroll past without an answer

I'm a first time mom. I'm 16 weeks and have been experiencing severe back pain that radiates to my ribs. I assume that they are growing pains but not sure what to do anymore. I've been to the ER twice in 2 weeks with no help at all. It's excruciating and lasts up to 3 hours before I can get relief. Has anyone experienced this and what methods have worked to alleviate the pain. I'm desperate to know. Thanks in advance