Re: Regretting not trying harder...
Relactating is a great option!
Otherwise don't try and beat yourself up! I'm all for breastfeeding. But no matter how a baby is fed I always say A happy mama= A happy baby. It sounds like you're a great mother; and like pp said you can always use this as motivation to breastfeed your next!
~Marjorie~ Proud Marine Wife
and Full time student, SAHM to my two gorgeous girls!