Do I really need a compression bra after breast reduction?

I had my breast reduction on the 16th. My doctor told me to wear a normal bra without underwire or pads and seemed really against compression bras when I asked about them, so I've been wearing a bra in the size 34C non-stop since the surgery. I'm not sure if I should buy a compression bra anyway, because in every post I read it was recommended, but it is kind of expensive so if I don't really need one I won't buy it. Thanks for any advice!