Anne, you sound like me. I've had my ears pierced 3 times; after they closed up the second time, I discovered that I have a nickel allergy that was causing chronic infections. Nickel is very common in cheap costume jewelry and can be released in gold or silver plated earrings.
The 3rd time was successful since I used gold studs, but for the first five years they would still close up if I didn't wear earrings at least every other day. They took a long time to fully heal. Also, for the first few years I had to be very careful about avoiding any metal with nickel. (Edited: I forgot to mention that as soon as I was able, I stopped wearing studs since I found them uncomfortable, and switched to lightweight drop earrings during the day.)
I didn't notice any complication from the scar tissue from my first two rounds of piercings, but the last time they repositioned the piercing on my left ear because the original piercing from when I was a kid was off-center. Unfortunately, the old piercing didn't heal all the way, so I've accidentally opened the hole back up by putting an earring in it when I'm not paying attention. It's kind of an icky feeling.
Basically, it's up to you about whether going through the healing process again is worth it. If your piercings close up easily, I'd recommend wearing earrings as often as you can stand, and coat the post in neosporin if you have trouble getting it back in your ears (since it lubricates & gives you extra protection against infection.) And to be on the safe side, if you decide to re-pierce, I'd strongly suggest using nickel-free earrings.
