Can menopause cause my body feel like I got run over by a truck?

I am 51 years old and just went off the pill after being on it since I was a teen. I have not had a period in almost 3 months.My problem is that all day, every day my body aches like I been exercising, which I have not been since I don't have the strength or energy. If I've been sitting for awhile, my legs hurt when I stand up. I'm scared to death it's something more serious. Can anyone tell me if this is normal?