Welcome to the forum.
I have read your query in detail. The symptoms you have described are more likely to be symptoms of muscles strain.
To get relief from the pain and for quick healing:
1. Do hot fomatation at the site.
2. Apply local anti-inflammatory gel 2-3 times a day.
3. Take anti-inflammatory drugs like Ibuprofen
to reduce pain and local swelling or inflammation.
4. Do not try to do exercise that involve painful muscles. Give proper time for the injury
I hope this information has been both informative and helpful for you.