I hear your concerns and can feel them . I was 65 when I got the pacemaker and just the thought of being dependent on a pacemaker scared me . I am a nurse and my concern was my atriums are in a fib and my ventricles are working only on a pacemaker .but when I consider the last 5 years and the hell I went thro with not feeling good . Now I feel good and it’s not perfect . But it does get BETTER . All the same thoughts . What if the pacer fails me . But in 40 years of nursing I have never seen a failed pacer . So you hang in there and get thro the adjustment time and text me for support . No you won’t be anxious all your life .. this too wi ll pass . I named my pacemaker Wilson . Lol

I am coming up to a year with my pacemaker (Bradycardia). I was nervous about everything but bit by bit I learned to trust my pacemaker. I am back to the gym 3X a week and lifting weights. The weights are not as heavy as before but I am quite happy with what I am doing. I do yoga and the occasional pilates class as well. And some walking. Be gentle with yourself and don't be afraid to ask questions about new experiences. Last week was my first confrontation with a walk through security scanner. I showed my card, explained my nervousness as a pacemaker person. The security guard explained nicely that I didn't have to use the scanner if I would allow a physical search. The answer to your your question is, "Yes, all this will pass."
I have found the Medtronic patient service to be excellent. As well as online, there is a phone service. I have called several time with what I thought were 'dumb' questions. Turned out, they weren't and my queries were answered by professional and personable folks. And there is always support here in the support group.