You won't be wasting anyone's time and the fact you have had help before and still struggle just means you haven't found the right person or type of therapy yet.
For therapy to work you have to be ready to be open and honest and put the hard work in, have a therapist you trust and have faith in and have the right kind of therapy.
I have had many different appointments over the years and the last three have been really helpful. They were all different types of therapy, and different people of course though all women, two older, one younger than me, and I was ready. The fear of never getting better was worse than the panic of having to say certain things out loud.
If your husband has apologised do you feel he means it and understand how badly he let you down ?
It really doesn't mater how long it go it was. If it hurts it hurts and that is your right.
My husband has done something really devastating but soon after I came out of appointment which could have had bad results and he was waiting in the room for me. He'd driven over an hour from work, and then went back again after buying me lunch, because he wanted to be there for me. I'd gone in early which is why he had to wait outside. I didn't need him there. I understood about work but he wanted to show care, etc. Your husband would do well to do the same.
You deserve peace. You deserve a man you can rely on and always had your back. Who will stand by you, listen to you and hear you and anything less then you are selling yourself short.
Make the call. You deserve it.