I don't think there should be any problem.
If you are not dizzy or not vomiting
and if there is no problem in your urine or bowel movements,then there should be nothing to worry.
However if any of such symptoms arise,then a visit to doctor would be required.
Local hot fomentation and take ibuprofen
400 mg three times a day for 3 to 5 days.
This should be enough.
Local lump would be a local collection of blood in the muscle,under your skin and nothing specific has to be done for that.it should go away of its own.