When you fall off during Water Skiing you have the potential to have major trauma. In your case the symptoms suggest a Hamstring injury but there is more to it.
The good news is no avulsion of the muscle from the bone.
The bruise tells that the muscle was torn. Muscles have very high blood supply. The bleed has the potential to track down the leg due to gravity, possibly causing the heavy / tired leg and shin symptoms. If this is the cause these symptom will go quite quickly. However by continuing with exercises and trying to run you may be causing more bleeding and so it continues.
You may find compression bandages from the calf up will help to disperse the bruise (blood). Elevation of the leg whenever possible plus gentle movement of the calf and hamstrings will also help dispersal of the blood.
You will then have to find someone who will treat the traumatised muscle(s) - the cause of the ongoing problems. My treatment approach would be palpation to precisely locate the site of the trauma and then TENS, Laser, Ultrasound and Ice packs at home.
Be careful with strong massage. Keep it simple - pain is damaged soft tissue being made worse.
Good luck,
Tony Woodall. Physiotherapist - Retired.