Unidentified, low-frequency, pulsing noise - could not locate a source.At approximately 01:00, on the night of May 10, 2016, I was woken to a very low frequency humming/pulsing noise.I got up, went to the window, nothing. So I ran to my balcony for a better view of the sky. The only thing I can say about what I witnessed was that the night sky was red, BRIGHT night - the brightest I have ever seen. The moon was only about half full at this point, but I could not identify a noise source and noticed the pulsing almost seemed to move across me - as of it was something tangible. Seemed to be eminating from south of my location.This noise was almost intoxicating - I did not want to move. I walked inside and about thirty minutes had past, but where the time went I do not know. It felt like less than five minutes from when I woke up to coming back inside, but that was not the case.Upon entering my house my dog (she is a hearty boxer) started backing up very slowly and began a low growl. I walked up to her and as soon as I touched her she was herself again. I also have three cats that would not come out of my bedroom until days later.I woke up the next morning with what appeared to be one long hive stretching from my mid thigh all the way up to the back of my ribcage (right side) - I have never had 'hives' before, but I brushed it off - initially. It has been almost a complete seven days since and the one big hive has not budged - not even itchy. I can run my hands along it without even realizing I am doing so. This is the most frightening experience out of the whole sha-bang.No craft was visible to me and I have not heard the pulsing noise since that night. I did bring my phone outside with me and thought I hit 'record' bc I remember hitting the 'stop' button upon entering my house again, but no video was recorded - no sight, no sound, and no time stamps.Ever since hearing this I have been on a mission to find others who might've heard this, as well. My parents' live about two miles north of me and I asked them both if they had seen or heard anything odd that Tuesday night. Both said no though my father did state the sky looked different that night than any other. My father has been sailing the world for over forty years so for him to state this... It means a lot to me.If anyone else in south Fl heard this, please make yourselves known.Thank you.