I did a mistake like that years ago. I did cut my long hair (not dreads) out of a really bad mood and totally regretted that descision a day after. But stupidly kept the short hair for years. During that time i hated to get a haircut every 6 weeks, hated to comb and maintain my hair daily. So i was wearing hats and caps a lot, to kind of hide my hair i was not pleased with.
I let my hair grow again for more then 12 month now and i feel released, not having to cut and maintain my hair regularly. By going the natural way i think i will get a result i am pleased with for years or hopefully for decades without having to put a lot of time and passion into maintainance. So my passion is to do what its good for me, i let my hair grow into dreadlocks and i hope i will be happy with that for a long time. Take your time an find your personal reasons for what is best for you, the rest is easy...