Your dog sounds like she is asking for help, please get her to the vet ASAP
Yes, you should be concerned!!!! Everything you describe is symptoms of Extreme PAIN!
Please, see her Vet to have her evaluated.....He/she (Hopefully) will be able to diagnose where the pain is coming from & treat accordingly.....I wouldn't wait as she sound as if she's miserable......Come back and let us know what you find out....Good luck, Karla