A sharp, stinging feeling while urinating is usually a sign of a urinary tract infection. It's very common in women and generally responds well to treatment, but it does need a proper diagnosis before starting anything on your own.
Next Steps
Get a urine routine and culture test done, since that confirms the infection and guides the right antibiotic. Many labs can arrange a home sample pickup, so you don't need to step out. Please consult a gynaecologist or physician online once your results are in, so they can prescribe safely.
Health Tips
Go in sooner, or to an emergency department, if you develop fever, back or side pain, or notice blood in your urine, since that can mean the infection has moved further up.