2007 Corolla Hatch

Hi all, I have a 2007 Corolla hatch 5 speed manual. The engine light started to come on but would turn back off from time to time. Recently car just started to loose power and would kind of misfire on accelerating but would even out once revs were over 2500 - 3000.The engine light now flashes if you drive which indicates the issue has become worse. I’ve changed spark plugs, fuel sensor and O2 sensor this far, my only hope is it’s not Catalytic converter, is there any other suggestions from those who may have experienced this before