Also you could try putting a bath towel under baby - DD1 had bad reflux so slept on a bath sheet doubled over (the extra huge bath towels!) for months and she had one in her cot and one on our bed so we were covered
That way I just stripped the towel off if she was sick (or turned it upside down to the vomit was below her feet if it had been a 3 or 4 towel night) and didn't have to wash our bedding.
I got a lot of 'Mrs TruthSweet, you know babies posset after a feed' when I tried to explain it was forceful and very copious (like pouring milk out of the carton at times) and she would scream while doing it (and scream if laid down and not in the pram, scream if a breast wasn't in her mouth, scream if she wasn't being held, scream well you get the idea!). She also used to sneeze a lot which apparently is also a sign of reflux (the acid irritates their throat and nose so they sneeze to clear it out). Our sofa looked like it had been on the top of Nelson's Column and had to take spare clothes out for DD1, me and sheets for the pram.....
We got a diagnosis/treatment when she stopped gaining the tiny amounts she had been and started to lose weight but I really don't think they should have let it get that far tbh. We also used to call DD1 Pukey McPukerson!
Is she unhappy at all during the day/night? Not just while being sick. If she is a 'happy spitter' and gaining weight the Drs (almost certainly in my experience) will do nothing as the various reflux medication can have some nasty side effects that can seriously outweigh the extra washing IYSWIM.
If you get told though that you will have to stop bfing to give Gaviscon (usual first line treatment) so it can be added to bottles, your GP really should read the instructions (bfing babies can have Gaviscon added to cool boiled water and spooned/syringed in). Though Gaviscon can cause constipation and doesn't necessarily work on all babies.