Hi Mum of 2,
Welcome to the forum and as you can see, there are so many of us suffering from anxiety/panic so you're certainly not alone!
I agree with ladies who're already responded, you should see a doctor asap to get some help for the anxiety before it gets worse. These things have a tendency to become a vicious circle -the more you focus on anxiety, the more you feel it and the more it controls your life. It's so overwhelming and debilitating
Couple of additional thoughts: your HRT, you said you've been on it for 2 months. Do you feel any help yet? Could you get a referral to menopause clinic to reassess the HRT regime unless improvement within a few weeks? You could try as well valerian root and other herbs that may help with anxiety, and melatonin and magnesium for sleep.
I'm currently trying out restorative yoga -to help calm down the autonomous nervous system. Its only my second day, so can't really say if it helps, but perhaps something to explore? At least it can't hurt, right.
And finally, what I noticed has helped me is to be very open about the ongoing struggle. I've told all my friends and family what's going on, so that I don't have to use any energy on hiding this and I've felt it somehow helps to call it out immediately when feeling panicky.
Take good care of yourself and let us know how you get on! xxx