Im a natural blonde and I dyed my hair black and had the black striped out about 4
Months ago.they then had to bleach and tone it 2 weeks later
And I've been deep conditioning it diiferent ways since .
It looks more yellow than blonde its hideous.I want to dye it once
More And get it trimmed but I'm afraid my hair might fall out
O be fried forever.what should I do?

Unfortunately it will damage your hair but as long as you leave it at that it won't be fried forever. Just no more experimenting (easier said than done) or it will never recover.