I read this and misinterpreted it:
... even if i save. i wont have enough saved to pay all the taxes owed for being "self-employed"
I thought that meant you wouldn't be able to pay your income tax and your half of payroll taxes.
It sounds now more like you mean you won't be able to pay just the "other half" (which company should pay).
In that case, you can quite probably use the SS-8 and especially the Form to get out of this. It will likely end your job there, which I guess you are ambivalent about.
I'm still a little concerned that you may not be fully up to date on how you are supposed to be handling taxes now. I think you should be doing quarterly payments to avoid underpayment penalty, rather than waiting until April. This is somewhat separate issue from your status.
However, I don't know if you escape underpayment penalty if IRS determines later, following up on the SS-8, that employer should have been withholding the whole time. If this exonerates you from underpayment penalty (Form 2210), that would be great.
But if you are concerned about cash flow (enough to state you cannot easily pay both halves of payroll taxes), I would imagine you would be erring on the safe side by doing what you can to avoid owing more (i.e. underpayment penalty) by doing estimated taxes. But I'm guessing you haven't, since you said it was only six months in that things started to dawn on you.
Have you researched whether underpayment penalty is waived if you win a SS-8 appeal?
It's good you have been setting aside some funds for your taxes. I am just speculating that your overall liability might be increased if you decide to wait until April to pay your taxes. But maybe I don't know the whole picture. For example, if you had no tax liability last year, you wouldn't need to be concerned about making estimated payments.
The underpayment penalty is only about 2% of the amount you didn't pay but should have. So if your taxes are 5K it would only be $100 extra. Maybe you don't mind paying that later if you either lose the classification appeal or you win it but IRS still imposes the penalty.