Burnout?

I’m really struggling and have been for months.  A late diagnosed autistic circa 2 years ago.  Starting to wonder if what I’m feeling is actually burnout as I seem to go through the same cycle every 18 months to 2 years on repeat.  I work but right now everything feels too much.  I dread work as I feel like I can’t cope at the minute, I have no patience at home.  Some days I feel like I literally don’t want to get out of bed but force myself over and over to do it.  I haven’t left the house on a day off now in months as I can’t face it I’m so exhausted, I have no patience for my wife or kids and I cry all the time.  Worse some days I question the point in all of it.  Want to ask my doctor for a sick note but can’t bring myself to let my boss or my team at work down or my wife.  Feel alone and trapped.  Feel like I’m drowning