Hugs gemmavicki and welcome, congratulations on your LO. These early days are very hard, totally exhausting sometimes, but I want you to know that however it feels right now you are doing a great job
Just a few things I'd suggest which may make your life easier. First, with the reflux, has LO been weighed recently and meds adjusted accordingly? Some of the meds are very dose-sensitive and with frequent weight gains in the early weeks they can need tweaking rather a lot. Second, (although I'm sure you won't) don't be tempted to compare with what other 9 week olds are doing, your LO is developmentally 4 weeks so only just coming out of the very newborn period. This is the time that many babies 'wake up' and can become much harder to settle and fussier. I would suggest focussing on the order of EAS where you can but not worrying so much about getting him in the bassinet for sleep. Neither of mine would do so reliably at this age and it was far easier to plan for sleeps in other ways eg a pram walk (good for you too!), sling (can't recommend these enough, especially for refluxing babies and ex-prems), swing (given he likes being rocked) or time a car journey appropriately. Sleep training for me was far more effective closer to the 3 month mark. Third with feeding - I'm not sure where in the world you are but can you see a lactation consultant to check latch and for a tongue tie if things are painful? Or your doctor if you think blocked ducts or mastitis could be an issue?
For yourself, make sure you aren't putting too much pressure on if you're feeling tired. What's important is that LO is fed and changed, and you have eaten and had something to drink. Nothing else matters for now, don't worry if the house is a mess (mine always is - I blame the kids
) or you haven't 'done' anything with the day. Getting through it is achievement in itself right now
Hope that is some reassurance, and as FPT23 said please do keep posting, even if we can't help in person we can listen and offer hugs!