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.