Two stationary crafts in the sky blinking green lights to each other

Twenty years ago I lived in a small apartment in Buena Park, California.  It was around 10:00 p.m.  on a cold January night and I decided I would have one last cigarette before I went to bed.  
I went outside.  My apartment is the first unit off the street.  While smoking, I looked up into the night sky.  The clouds parted and I saw two objects in the sky.  The  first was  a huge object with lots of widows with green lights coming out of the windows.  The lights were blinking on and off as if it was a code.  
The second object was the same shape as the first, only smaller.  It also had blinking green lights.  To me it looked like they were communicating to each other.
I felt happy and excited that I was witnessing this event.  I did not think I was seen or that these objects knew anyone was watching.  I did not speak of this event to anyone.
Recently I went to my doctor for sinus problems.  He ordered an x-ray.  X-ray showed a "screw" shaped  item in the top of my head.  I have never had surgery on any kind on my head.  My doctor sent me to see a surgeon.  Surgeon stated he could not remove this item because the procedure would be to painful and he would not do it.
For some reason, I started thinking about the UFOs I saw all those years ago.  I have had some flashes of memory.  I remember being very close to the ship and feeling very frightened.  I believe I was abducted.
Witness indicates that the date of the incident in January 1991 is approximate.  PD