It takes me two pumping sessions to supply for one feeding....

It is doable. It is not fun. I found that more frequent, shorter pumps helped me to keep up. Can you sqeeze in one more short pump on your lunch or something like that? I don't know what your schedule is like but it helped a friend of mine.

Also, maybe do smaller bottles for the daycare...I don't know how many you are doing now, but for us I tried to do 4 bottles rather than 3-4 oz bottles. I used to do the first 3 with 3 oz and then the 4th bottle would be smaller so DS was ready to nurse as soon as we got home, if he took the extra bottle at all. They'll have it if they need it, but they didn't always have to use it.

You can do this if you make up your mind to do it. I swear you can. It's not easy but it is doable. And I will say, although I may be opening a can of worms, that you can choose to keep going to 6 months and supplement part of the time with formula if it is what you need to do to stay sane and take care of yourself. Some breastmilk is better than none and buying only a little formula versus all formula is still cheaper (I personally hate how expensive the darn stuff is). I had a friend who simply hated pumping and did not want to do extra pumping sessions to keep her baby on EBF. She usually pumped 1x a day and fed what she had and then did formula after that, plus she nursed at home and on weekends. She kept it up to 1 year that way. The process has to be manageable and sustainable for you or you won't do it.

And at a certain point, I added fenugreek and blessed thistle to my regimine to keep things going--they can really help to keep things going with increased pumpings.