Can I change my feeling of being worthless to everyone?

You have several things going on here. The sleep should be addressed with a primary care physician to rule out any physical issues. Sleep is the big reset and allows us to function in the day. What happens during a depression is that our thoughts race and it is as though our “brain won’t shut off.” Medication can help with this. I also use a Pranayama yoga breathing technique called the four fold breath which has great usefulness for relaxing us  and often does work quite well with allowing us to sleep.. You can read about it here:    https://billleavitttherapy.com/breathing-techniques-the-four-fold-breath/

Your thoughts on feeling worthless to everyone fall under a heading of thinking error in Cognitive Behavioral Therapy (CBT) known as overgeneralization. In CBT thoughts lead to emotions, so we are going to pick the statement apart and then reframe it.

First list the evidence that contradicts the thought. Has anyone in the past made positive comments toward you? This might be hard to recall if we are in a rut, but at some point in life we frequently have had some positives expressed towards us by others.  “Everyone” is an absolute. The specifics on why you are thinking this need to be addressed. How are you arriving at this conclusion? There may be specific people that we want more validation from. Or specific people might have made offhand hurtful comments, (such as a family member, teacher or co-worker) but if I extrapolate that to a global and think that everyone thinks I am worthless, that thought is not rooted in facts. 

What are the Pros and Cons of thinking this way? What are the Benefits and Costs? There are very little pros or benefits to thinking this way. It’s just going to continue to tear you down and make you feel bad. So can we reframe the thought about the situation? Is there another way of looking at the situation? Again, we need the specifics on how you are arriving at this conclusion, and a one on one therapist can definitely help you with this, but the thinking that you are using to arrive at the conclusion needs to be re-cast into a more helpful mindset.