SM-T510 Possibly flashed wrong TWRP, stuck in a bootloop now and can't access download or recovery mode

I was recently flashing what I thought was a newer version of TWRP for my SM-T510, but now I realize that I probably flashed an incompatible image. Everything went fine for a couple of days until I needed to boot into TWRP again, the first time I've done this since I flashed it a couple of days ago. Upon rebooting, I got as far as the unlocked bootloader warning screen, pressed the power button to pass it, and it immediately rebooted and started the process again. This time I skipped pressing power and chose to wait out the warning, and it rebooted again. Leaving the tablet alone, it just goes through this bootloop cycle continuously.