WHAT could this be?? diagnosis please?

ok WHENEVER im in a class or outside of school and i talk to a group or just a few people i dont really know that well, i get SO nervous on the inside like my body sends signals that im nervous, but im not actually nervous. Like i dont feel nervous around them its not a big deal but my heart starts racing and i start shaking like my hands i feel nauteous i dont know why and i get tingly like SO nervous and it makes me not want to hang out with anyone new what is wrong with me!