What is your greatest Mum regret when your baby was between 0-2 yrs ?

Not trying to breastfeed longer. I gave up once maternity leave was over as I could not handle work and breastfeeding at the same time. It was also tough enough to deal with the mounting work load, and the guilt of being away from office for 4 months - could not imagine also having to request down time for pumping. In hindsight I regret this. Should have insisted to take the six months off from work and devoted the extra two months to complete the 6 month journey.