You have very limited options- you can stay in, you can sell at a price the partner will accept, you can hire a lawyer, or you can represeent yourself. Thats about it.
You want out--so option 1 is a nonstarter.
You won't agree to a price with the partner--so option 2 is out.
You can't afford an attorney--so option 3 is not happening.
Representing yourself against the attorney is all that is left. That likely won't go very well for you.
Seems to me that accepting your partners price is the least expensive way out--but you have to measure that against other factors and circumstances you did not post. I wish you the best of luck with this tough decision.
NOT LEGAL ADVICE. FOR EDUCATION AND INFORMATION ONLY. Mr. Rafter is licensed to practice in the Commonwealth of Virginia and the US Federal Courts in Virginia. There is no implied or actual attorney-client relationship arising from this education exchange. You should speak with an attorney licensed in your state, to whom you have provided all the facts before you take steps that may impact your legal rights. Mr. Rafter is under no obligation to answer subsequent emails or phone calls related to this matter.
As to the conflict of interest issue, the other answers gave very practical advice. This depends on who the attorney represented before. If the attorney represented the corporations, which is typical during the incorporation, he or she did not represent either of you before. In that case, there is no conflict which could be created as you were not a client before. It is unusual and unwise for an attorney incorporating a business to represent the individual owners/members during the incorporation process.