I’d go to the doctors, they will send you for an X-ray.
I broke my ankle about 10years ago and when I was in A&E they x-rayed and asked me when I had previously broken it. I wasn’t aware that I had. The only thing I could vaguely recall was being about 6 and falling in PE and my ankle swelling up horrendously, but the hospital at the time told us it was a sprain so who knows.
Anyway, my new break didn’t heal properly either (walking and riding on it probably did not help matters) so I was asked if I wanted surgery to break the badly healed bones and reset them. I declined as it would have meant at least 12 weeks out of action. My ankle isnt the best and no doubt will be riddled with arthritis at some point.