When i was fourteen years old I had a girl friend and every time i huged her it felt like I was energizing my self off of her energy and every time i'm around elements like lighting I feel more energzie.
I didn't even know I was until very recently. It was an on-going thing. Little things started happening. I knew the cards in the deck in the order they were drawn, I could tell my friend when he would win on a slot machine, and my most vivid dreams started happening. I asked a parental about it(Parental being fellow Elder) and she agreed that the possibility was there. I would suggest looking for the little things and being intelligent enough to fit it all together...But don't feel bad if you can't.
I agree also from it does sound like you can be, the difference is that after a day passed you will feel a bit weaker than you felt with the storm rageing or after you huged some one for example.
If not than it is simply a partial indifference in your Ki/ lofe force energy and that means that a phi vampire fed from you alot or very deeply cuasing your body to exhibit vampiric tendensies of its own.