DESPERATE FOR BRA HELP!

Please recommend a brand of bras or what I can do/wear to be more comfortable. For the past month, I've been buying a new bra size every week, have it feel good for a day, and then be completely uncomfortable after that. I have tried sports bras, regular bras, even unlined & unpadded bras. They all hurt the band area so bad. There's got to be SOMETHING out there, maybe I'm just not wearing the right brand or type? Are nursing bras comfortable? Should I just get some of those now? Please help 😩