I feel like my life is a giant mood swing due to anxiety.
What makes you think you're suffering from anxiety?
I know I'm suffering from anxiety because I have constant anxiety attacks
That sounds like a pretty good reason to think you have anxiety issues!  If those attacks are that frequent, you should get some help!  It's not healthy to always be anxious.
No, I think I can handle it myself.
I know you think you can handle it yourself, but I think you would have much better success if you talked to a professional, like a therapist. They're trained to deal with issues like anxiety, and I'm sure you'll feel much better after talking to one.