Reflux is HARD. On top of the experience you have already had, it's probably doubly hard.
DD was term, but had reflux. She was EBF, but I spent days covered in vomit, buckets to hand to try to catch it before we covered everything, washing machine going constantly, tumble dryer going when WM wasn't, etc. DH's job was to feed me a good, plain dinner every night, make sure laundry was under control, and take DD to let me snooze a couple of hours in the evening. And he would give bottles of EBM as well. DD was also a very sleepy baby who wasn't interested in feeding much, so I spent a lot of time waking her, stripping her down to make her wake up, and pinching her toes.
Get hold of a sling. It was a lifesaver. Feed the baby, burp, pop in sling and get up to do whatever for half an hour. Then you can put the baby lying down again for the other hour. In the half hour, you have a chance to make a cup of tea (I used to make it into a travel mug and pop the lid on), tidy up the kitchen, put out laundry, say hello to neighbours, walk to shop for the paper, get post from postbox, make a start on my next meal preparations, clean and sterilize bottles....etc.
I also had DD in a high chair reasonably straight up from pretty young (able to hold head) - we got one that had a back that dropped back into 3 different slots, so could be somewhat or a lot reclined as well as straight up. So she was able to use it quite early.
I kept the job of making the bed until after the first feed, and once she was settled (so not the first 10 minutes - most danger time for throwing up), I'd sit her up between loads of pillows, and make the bed around her with sheets flapping and having a game. Then she would sit back a little more while I got dressed myself, and then I'd get her changed and dressed after that as the half hour would be pretty much up.
OTOH, I was pretty well able to cope with that. I really struggled with BF because of the reflux, but we got through. Just. We didn't have a whole load of other meds and things to think about at that stage. And my DM did come up for a bit too, and I was able to get out most days into the fresh air, and DH did a lot every evening and weekend.
DD had days where she had formula. Once she got to crèche (3 months, as I had to go back to work), she was still reflux-y so had some EBM with her daily but always had backup formula powder and bottles ready to mix, and spare clothes. And I also had that space to myself of being back at work - so exhausted, but not just coping with the baby and able to talk real talk, and wear clean clothes for a few hours that would stay clean.
You've already given your DC the best possible start, by BFing. Now that you are over that start, you also need to think about all your needs combined. So if that is having one/two bottle a day of formula, or taking one full day off and seeing what happens, going completely to formula, renting a hospital grade pump and feeding the EBM in a bottle to give you some better control (and let others feed while you rest whenever the chance is there) or seeing if you want to struggle on for another while - any one of those options are absolutely FINE. Even if you do start to move to formula, you may find you need to do it gradually enough so your breasts don't (not literally) explode.
Best of luck. And there are no wrong decisions on this. 