The first thing to do is to buy a glucose meter. These halucinations are common with either very high or low blood sugar. The halucinations are very real and tactile. They are produced in religious exercises by fasting, and are common with extreme diets.
I do not argue with the advice above, but to explore other details
1) you say you saw the lights, but you boyfriend did not?
2) you felt the presence of the man/figure, do you fell a presence at any other time, at any past time in your life? I don't even know what that means, would feel like.
I am a bit "spooky" and over respond to unusual sounds and shadows and take measure to calm my imagination (which is all it has been so far, thank God) such as motion sensing lights around my house, and loaded guns. I am at/past the age where eyes start producing "floaters" and I have reacted to those at times with a chill down my back and the feeling something passed by the doorway to the next room. Maybe that's feeling the presence of another "being" in the area. These always past fast for me. One thing I have going for me is I am a large male myself over 6' 5" and in pretty good shape at 225 pounds (albeit old and slow).
Just trying to relate, hope I am not off the subject.
Do you know you were awake when you saw the lights and figure? Or was it a dream and you later woke up and turned on the light.
Did leaving the lights on prevent any further occurrence - did you sleep with the lights on? If so, then you mind feels some security with the light being on, perhaps you mind, like mine, would gain some security if you had one or two motion detector alarms in you home...but these could be tripped by someone who is moving about with your permission - you said you have two boys, very young or old enough to be of some help?
By all means, check out what caregiver222 has offered, and beyond that think about some of the above as the basis of a strategy to help you mind take control.