Thanks for posting your query,
The symptoms that you have described are likely to be related to a soft tissue injury
. However it is best to rule out any bone injury
after an X-ray.
I suggest you to consult an orthopaedician nearby for a detailed examination. You may get the X-ray of the area affected under his/her guidance.
Avoid weight bearing on the foot till then and get some mild pain killers prescribed.
I hope this information has been both informative and helpful.