Ok.
I hope that you will have a weaker withdrawal than me, since I see on this forum that it is different from a person to person.
About a withdrawal, try to take some vitamins, people say that it helps for our bodies to return to a normal state again.
Drink lots of fluids (if you take more fluids, you will have a higher blood volume and that slows down your heart. if you don't drink too much in general, your heart rate will always go up slightly).
I was taking some magnesium pills, on other forums on internet I have learned that Magnesium slows down a heart in a natural way, so it helps during a withdrawal.
About anxiety and withdrawal, I was taking 1Mg of Valium which is a tiny dose, and only 2-3Mg on worst days during a withdrawal.
Now, when I have quit BBs, I have later stopped Valium also since I don't need it anymore and my brain is learning how to deal with emotions and adrenaline again.
My opinion is: if your situation won't get worse in the next 20-30 days, then you are fine. Your withdrawal will be milder.
Also, be prepared that symptoms won't come in the same time.
For example: first few weeks: elevated heart rate, elevated blood pressure, nausea etc.
Then those will get milder, but you will suddenly start to have dizziness (that is normal) out of nowhere. And headaches and random pain over your body.
Then after some time, anxiety may get ever worse.
So, symptoms won't kick in in the same time together.
People often get some symptoms in early weeks, then new ones after a few weeks.
Also, be prepared for a strange phenomenon where you will have episodes of good and bad days for weeks.
For example, first 2 weeks will be bad.
Then you will have 2 awesome days without any symptoms, you will think that you are fine now.
Then again you will have 8 horrible days (all symptoms will suddenly return).
Then you will have 2 good days again.
Then 5 mediocre days.
Then 3 good days again. You may think that you are over now.
Then again, 3 bad days will hit you.
Over time, good days will last longer and longer and the episodes of bad days will be shorter and shorter plus they will be of a weaker strength.
So, after some time, it will look like this:
5 good days.
3 bad days.
6 good days.
3 bad days again.
8 good days.
2 bad days.
10 good days.
2 bad days.
14 good days.
1 bad day.
14 good days.
1 bad day etc
Try to rest and sleep a lot during the first few weeks since your body will be exhausted from a too fast HR all day long.
If you will be feeling fine, try to do some housework, walking etc.
But always listen to yourself, and listen to your body, since each person is different.
Good luck and ask if you'll have any problems.