Why am I not getting better with sertraline help?

On a single dosage it can often take 6-8 weeks or sometimes longer for the drug to become fully therapeutic and after a dosage increase it can take a couple more weeks. Including your dosage increase, 5 weeks isn't really long enough of a trial to judge the medication.
Have you spoken with your doctor? Let them know you're having anxiety symptoms and ask for their professional advice.
It most likely is a matter of time and keeping a positive attitude. Anxiety breeds more anxiety.
Take care!

I’m so sorry to hear that you are feeling so bad.
I am no expert but from what I have read it can take a longer time for some people. They say 6-8 weeks but I’ve heard others say it was three months before the medication kicked in for them.
When I was on Lexapro many years ago it took four months before I felt better. But I did get better.
Another factor could be how long you were suffering before seeking medical help. I’ve heard that anxiety can take longer to treat, especially if you are in a bad way. That was definitely the case for me when I was put on Lexapro.

Obviously speak to your doctor but I would give it time. In the meantime you could try magnesium to help calm you. I have a powdered form and add water to turn it in to a drink. I sip it slowly and find it calms my nerves. Another thing that helps me is an APP I use on my phone called Inset Timer. It is free. There are many guided meditations specifically for those dealing with anxiety. I try to do one every day. They are only short, about 15-20 minutes and easy to follow.

I hope with all my heart that you start to turn the corner soon. Have faith in the process, that it will work and you will feel better soon