My balls literally feel cold, is it cuz too much ejaculation? -
they-re not tight and up as normal
Your testes are temperature sensitive. When they-re too cold, they pull tight against you (your scrotum contracts). If they-re hanging low, then they were too warm. I doubt if your firing off an excessive number of air-bursts is causing the problem.
That is normal. Testicles are soposed to be cold, that is why they are outside the body and not inside, like a female-s ovaries. Sperm is better kept that way.