Are higher frequency noises or lower frequency noises more harmful to your ears? my ears have become sensitive and loud high pitched sounds makes me feel nauseous and like jumping out of my body. will this get better and what noises should i avoid?

Both: Both high and low frequency noises can be damaging to one's hearing if loud enough, or if exposed to long enough. Haven't seen any research studies comparing each to determine which is more damaging. It's sort of like comparing lemons to limes... hard to find a difference. Anyway, one should wear good hearing protection if exposed to loud noises. For comfort, avoid sounds that sound irritating.