I always put it on a different leg every other week, because I am aware of the serious side effects. I'm 17, don't smoke but not too active. I also only weigh between 110-113lbs and I'm almost 5"5. I was told because of my age that I don't really need to worry about things like blood clots.
However, I was side tracked studying for final exams and put my patch on the same leg I had it on last week. After a few hours I felt like a needle was poking me under the patch. I immediately took it off, and I'm scared I'm getting a blood clot.
My knee and sometimes my calf have the sensation of almost a growing pain... But while I took exams today I didn't notice it- maybe it's all in my head? We don't really have the money to see a doctor, so I'd like opinions before I worry my mother.
Do you think this is serious?

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