Welcome.
Hope that you are feeling much better after the crash and that you are fully recovered. Having rested up after the accident it's not surprising that you gained fat. People are not great at altering eating habits to match calorie expenditure differences. In my mid teens circumstances dictated that my daily calorie expenditure dropped drastically & permanantly. It took 8 years before it dawned on me that I must change my eating habits - calories in vs. calories out ratio. Basically, I was fat.
My advice at this stage would be to correct the calorie imbalance that may be still be at play. You mention that you have just started to sort your diet and exercise more, so chances are you probably are in a general calorie negative state, so why not let things run naturally and steadily. Fat loss rate should be modest at say 1-1.5lb per week. If you have lots of fat to lose then just by increasing activity levels and nailing diet, the fat should be coming off without even trying. When things start to slow and fat loss becomes tough, then perhaps look to adding chemical aids.
In short, address these issues before even thinking about drugs:
1 - Visit the diet forum for assistance. I have yet to come across a diet that cannot be improved in some way. More often than not, the "pre-help" diets detailed in that forum by members needing assistance are truly awful.
2 - If fully recovered from the crash, incorporate strength training into your lifestyle if you have not done so already. The benefits of which I have outlined 3 posts back from this one