Contemplating buying things

I’m 10 weeks into my sub pregnancy and have lower back pain on and off since week 7. I have been checked twice since it started and everything seems fine with the baby. My doctor also referred me to an orthopedic doctor just to make sure we aren’t missing anything.
I saw that a pregnancy pillow might help, but I’m so scared to buy one and if something goes wrong again I will just have this huge relic in my home.
In my previous (TFMR) pregnancy I thought of buying one at around 20 weeks, but then everything went wrong and I just didn’t want to have it around me even though I tfmr only at 27 weeks.
I’m sure if anything goes wrong my husband and dog would love to have it, but I’m just so scared to acknowledge this pregnancy sort of and act as if it is a normal one.
How do you feel about buying pregnancy stuff? Especially when it is so early.