<human>: Can you succinctly summarize the text in 1-3 sentences?

Disclaimer: I'm an idiot. I don't need to hear about it, I already know.

Background: I pulled a hamstring through over-exertion this past April. After about a month, it felt fine. Stupidly, I took this to mean it was completely healed, and went ahead and skated in a co-ed roller derby bout. I tore the shit out of it again.

After 3-4 months of the pain not going away, I finally went to the doctor. He prescribed 1-week regimen of a muscle relaxer and an anti inflammatory, and told me to return to him if the pain was still present a month AFTER the meds ran out. 

The leg felt measurably better while on the meds, but when they ran out, the pain came back. It seemed to get worse with increased inactivity. Rising from a seated position was the worst.

So, after the allotted time, I went back to the doc. Describing my symptoms, he concluded that I probably had sciatica, and that the treatment was the same. He prescribed the same meds, only for 2 weeks instead of 1. He told me that if I was still in pain 2 weeks after finishing the pills, I should come back, and we'd talk about me going to see an Ortho doc.

As of this writing, my leg feels fine most of the time. I tested exerting myself just a little at derby practice a few days ago (5 quick laps on skates... no sprinting), and now I've got a dull ache.

I want to exercise again. I'm trying to lose weight. My plan was to take it easy until late January, then start gradually stretching and doing something low-impact. Any advice here would be greatly appreciated.
<bot>: Hurt myself, didn't allow enough time to heal, hurt myself worse. It's been 7 months, and I finally feel better. How much longer should I wait to begin exercising?