Thanks for writing your query.
I would like to reassure you that you that the pain in your right leg can be due to the injection and will soon subside.
You can do hot fomentation for relief.
I would also like to inform you that steroid
causes increase in blood pressure and heart rate
due to its vasoconstrictive properties and will subside as the effect of the steroid is finished.
You should get yourself clinically examined by your doctor for alarmingly high blood pressure
You can take painkillers like Ibuprofen
one tablet twice a day after meals along with an antacid like Omeprazole
40 mg for relief from pain.
Any medicine to be taken under medical supervision only.
I hope this is helpful to you.