Sleeping through my depression?

Everytime im stressed out, get into a tough situation, or just flat out depressed, i often sleep through these problems. I just lay down in my bed whenever these things happen hoping when i wake up theyll go away and most of the time this works and i feel better. But i feel like im treating my sleep like a drug. Because whenever im feeling down, sleeping through it is like take a dosage for a drug. I know this might sound quite rediculous but its really messing up my daily routine. I come home from school and whenever ive had a bad day or im bummed out i just forget about all my worries by laying on my bed and just contemplating my thoughts while i doze off. And at times my naps last for more than 4 hours! And i wake up realizing theres work to do and i never end up completing anything during my day. Is this a bad habit? some answers please.