If you had a mass in the pelvis, I would think that an ultrasound is the right test to figure out how large, and what tissue it is coming from, and what (if anything) needs to be done about it . If you didnt have a mass, then an ultrasound would not be needed. Your physician should clarify this for you. Usually, if a gynecologist can feel a mass on exam, that can be a fibroid (benign growth of uterine muscle), or an ovarian cyst (usually these are benign in women of reproductive age). However, most gyns who think there is a mass will obtain an ultrasound to characterize it.
A 'tilted' uterus has no clinical meaning. Most uteruses are tilted, some forward, some backwards, others to one side or other. That does not mean anything interms of your ability to become pregnant, deliver a baby, or experience/not experience pain or other symptoms.
A single episode of incontinence, can happen ofr a variety of reasons I would encourage you to see a urogynecologist or urologist if the problem persists...