Ummm RICE method for a week isn't doing any good. Don't do this until others chime in, but foam rolling has helped me in the past. Stretching of the posterior chain and not just the hamstrings. You likely have tight muscle groups and the weakest point were your hamstrings. So some type of hamstring exercise after the strain has healed.
Rice? Put it in rice? Man that works for everything.
Ow. That seems to be a bit more than a tweaked hamstring with all the bruising.
I've been trying to heal a hamstring pull (no bruising) for a good month now, while trying to up my mileage for a Tough Mudder in 12 days. Seems that every time it feels a bit better, it takes just one movement to feel the twinge again. I didn't realize how tight my hamstrings were until I started using a foam roller. Hoping to add in some single leg glute bridges and single leg deadlifts.