Breastfeeding while expecting

Hi mamas, we just found out we are expecting our second baby and our first is just over 11 months old. I wanted so badly to make it to a full year with exclusively breastmilk but my supply has taken a SERIOUS hit since we’ve been expecting. Anyone have any tips on how to bring up my supply for these last few weeks? Really don’t want to have to give formula after making it this long but all my tricks that would normally help increase my supply haven’t been working. I nurse her while at home and pump while at work. Only working part time, but still can’t keep up while I’m away. Thanks in advanced mamas!