She is having 6-8 wet diapers a day and about 1 (maybe 2) dirty but it's never a lot. She was also constipated so I'm wondering if she still is.
I try not to supplement a lot. It's usually after she feeds on both sides, still is hungry and then won't latch again. I will just keep trying to get her to re latch.
I hope to get this down before I go back to work on June 8th.
The nappy output sounds good (constipation might be due to formula).
It may be that she's frustrated by how hard she has to work after the initial fast letdown so that's why she finishes one breast and goes to the other and then comes off hungry. Breast compressions can help stimulate further let downs (so once LOs suck slows down you do a few breast compressions -see Kellymom for instructions- till LOs suck picks up speed again).
It may be that she has some wind that mimics the signs of hunger so spending 10mins or so trying to get a burp out might distract her, and you, enough that after that she'll go back to the breast with less fuss.
Remember she knows you, she will (often, no guarantees) be calmed by the sound of your voice, the sound of your heartbeat, so odd as it sounds if you place her ear on your hear and give her and you a little calming pep talk about how you are in this together as a team she may well calm down enough to relatch.
If you are both getting very distressed of course feed her formula or expressed milk, but try smaller amounts just enough to calm her. Spoon, cup and syringe feeding are also good ways to ensure baby isn't taking more than she needs.
Supply isn't a "there" or "not there" thing. Your body makes what she demands but it takes a day or three to catch up and for those few days she will be hungry. The more formula she gets during these times the more you risk a few days of playing catch up stretching in to weeks.