Hello, I M Recently Experiencing Something Like Hot Flashes. I

Hello,
I m recently experiencing something like hot flashes. I feel my body burning inside out. Like my blood is boiling. It starts mainly within my chest, back & neck, then spread to my head, arms & stomach.
It happens randomly during the day but increases while in bed before sleeping.
Any opinions?

Here are some info (were asked in a similar question on your website)
I m 36 yrs old, 162 cm, 92 kg.
I smoke 10-15 cigarettes a day.
My periods are extremely irregular. It can stop for months (like 2 to 4 months) & sometimes twice a month.
I have 3 lumbar herniated discs & currently resting in bed for almost a month.
I had depression & anxiety attacks few years ago & took antidepressant for almost a year. Now I get anxiety attacks but less frequently.

Thanks in advance