Hellobee Boards

I think you can. There are supplements you can try--More Milk Plus capsules, nursing frequently, maybe pumping for 5-10 minutes after nursing as well. I know some people take Domperidone as well to up supply.

I was past 12 weeks when I went on domperidone. Same for me the stress of pumping at work and my crappy no-time-for-food diet & my supply was pretty weak.
The domperidone doubled my output. It did slow back down when I weaned off of it, but I was able to stockpile breastmilk for a while.

I wasn't able to increase it with drinking more liquids, oatmeal, supplements, etc.

Yep, just keep putting baby to the breast and your body should respond to the increased demand!

I would think so as well. As everyone else has said, drinking lots of water and putting baby to the boob all the time will help. You should also consider nursing your "job" for the time you are home. No cleaning, no cooking, no errands. Just lay in bed, stare at your baby and keep them on the boob.

yes, i think so. i added an extra pumping session right before i went to bed and my supply increased over a couple of weeks. whether it was the extra pumping and/or other factors i'm not sure, but my supply did increase well after the 12-week mark (around the 6-month mark).