Ah, well you can often experience hallucinations before you even realize you are in SP. The delay in your extremities has me even more suspicious that these are in fact, hallucinations. I have often felt the increased heavy breathing as well as a rapid heart beat. These are fairly common hallucinations during the WILD process. I would try to ignore this completely and see if it goes away after a bit. If you are unable to ignore it, try to force slow and deep breathing...as one would if they were asleep. If you know that you are breathing slowly, but it still sounds/feels like you are breathing fast, it is definitely a hallucination. If you force the slow deep breathing, you can usually decipher the hallucination from your actual breathing. You shouldn't have trouble breathing during SP. Do you also get an increased heart rate during this time?