How has CBT worked for you? What should I expect? How long did it take to work?

I've watched some videos on YouTube and stuff... but this is all really new to me.

In terms of me (sorry, a bit of a vent, but maybe someone in a similar situation can relate!), I've always been a worrier since I can remember, although I've never been to a doctor about it. As an adult, I've got pretty good at controlling it. I could rationalise my thoughts, identify my thought processes, and stop them from overwhelming me. 

I've hit a bit of a turning point now though. My long-term partner (the only partner I've ever had) unexpectedly and suddenly ended things 10 months ago though. This has been the first 'trauma' of my life (as dramatic as it sounds) and has shown me that, actually, maybe I can't control my anxiety when times get tough.

I've given myself a while to 'recover'... but it's actually getting worse now, almost a year later. I think I had my first ever anxiety attack at the weekend.

I'm not controlling it anymore. Every single day I'm going through cycles of anxiety. I think I've finally hit the point where I realise that living life this way is extremely difficult, and I'm just hurting myself by not reaching out. 

I have to reach out for help, and admit that something is wrong, which feels like a big step, but one which will hopefully improve my quality of life in the future... I hope it works!