My left testicle tends to hang lower than my right and my right testi seems to react more to movement than my left and kind of twist should I worry?

Yes and no. The lower testicle is likely demonstrating more of what testicles do to maintain temperature hang lower in warm times and elevate closer into the body in colder weather. As far as spinning and twisting a torsion of the testicle is always possible so with heavy activity a cup can help. If the testicle does torsion it is acutely painful and you should go to an ER pronto and not attempt to undo it.