Hi Shalby,
I play soccer and have had similar stamina difficulties caused by being overweight. I would suggest that you work hard to lose those extra pounds. I have used Phentramin-D, which worked really well for me, but everyone's different. This diet pill contains caffeine and geranium. I take one at breakfast and then another about an hour before working out in the afternoon. My workouts have been much more productive because Phentramin-D provides a good boost of energy. Follow this link for more information:
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As for increasing stamina, what really worked well for me was resistance exercises with my leg muscles and running intervals for 30 minutes three times a week. These techniques, combined with losing some weight and regular training raised my endurance and stamina to a new level.
Good luck, I hope I've helped. Do you run professionally?