EFT is great! Plus I've found you don't have to believe. Just play along and see if it helps.
There are lots of body solutions to what appears to be a mind problem. When you feel anxious, for example, try this: stand up and cross your feet, then cross your hands over each other and turn your clasped hands under your arms up to your chest (this is hard to describe, I wish I had a link), then press your tongue to the roof of your mouth. You'll be amazed at the effect. It is a short term help but can get you through a sticky situation.
Do you know what calm feels like? If so, you can replace the "concept" of calm with the feeeeeeling of calm inside your body. Even if you have to pretend you know what calm feels like, it can work.
I'd highly recommend going for emotional stress defusions is you can afford them. Again, don't worry about believing, just see how you feel afterwards. Here's a description.
What we do You can find practitioners there also. They also know EFT.