If you really ran a 3:59 indoors then I'm assuming you probably also ran at nationals. Here are the mile results for 2008 Indoor Nationals, which would be "a little over 10 years ago." If you are 32 now then perhaps you were one of the seniors in this race?
Preliminaries
1 Garrett Heath SR Stanford 4:05.22Q
2 Leonel Manzano SR Texas 4:05.42Q
3 Andy McClary JR Arkansas 4:05.34Q
4 Andrew Acosta SO Oregon 4:05.45Q
5 Michael Maag JR Princeton 4:05.38Q
6 Jake Watson SR Notre Dame 4:05.73Q
7 Micky Cobrin JR Arkansas 4:05.79q
8 Jake Morse JR Texas 4:06.08q
9 Jeff See JR Ohio State 4:06.10q
10 Peter van der Westhuizen SR Nebraska 4:06.17q
11 Michael McGrath SR Oregon 4:06.61
12 Hayden McLaren SO Providence 4:08.27
13 Carl Mackenzie FR Villanova 4:23.80
14 John Richardson SR Kentucky 4:24.40
-- Sam Bair III SR Pittsburgh DNF Advaned to Final
-- Kyle Miller JR Texas DNF