A sharp, burning pain right after this kind of contact, lasting hours, along with a trace of blood while passing urine, usually points to a small tear or injury to the delicate vaginal or urethral tissue. It can look alarming but often settles on its own with care over a few days.
Next Steps
You can keep the area clean and dry, avoid any further insertion or friction for now, and drink plenty of water. If the burning or blood continues past a day or two, please see a gynaecologist in person to rule out an infection or a deeper tear.
Health Tips
Go in sooner if the bleeding gets heavier, you develop fever, or passing urine becomes very painful.