I’m scared of my dog and am thinking of rehoming.

I adopted my dog from a rescue that didn’t tell me about any of her behavior issues. She has been very sweet with people but has always been extremely dog aggressive. We worked on her behavior for years and she got so much better and we could go on walks. She would always tense up when she’d see another dog but she stopped lunging and barking, but there was an incident that brought her back to how she was before all the training. Because she’s now back to being extremely dog aggressive and reactive it’s difficult to bring her on walks because we live in a neighborhood that is very dog friendly. We can only go at certain times. Because she’s now not getting as much stimulation she has become a little reactive towards me and I am now scared of a bite. I never thought I would rehome I’ve put so much work into her.