Well without telling us what type of soil. What type and size of pot. What type of light. What strain it is. What temps your at your not going to get much help.... I can tell you at 45 or so days from seed that thing looks beat and there's not going to be much saving it at this point. I have photosenstive indicas that finish in 56 days after the flip..why the autoflower? My guess is the medium isn't right but who knows you've hardly provided any info.
Its like saying "hey my car isnt working right anyone know whats wrong?" with a picture of the car below it......
Id trash it order some decent genetics and get your potting situation figured out.