can I cancel a contract without repercussion

It’s possible.  Unfortunately, I simply can’t say without a review of the contract.  Generally, residential real estate contracts will have provisions that tell you exactly what your rights are in these situations – what you can do, when you can do it, and what course of action you can take.  Since the consequences can be pretty high (again, depending on the contract) for cancelling the deal when you shouldn’t, I’d say you’d be best served by consulting a real estate attorney to review your contract (and perhaps negotiate your exit if the contract allows it).  Keep in mind that even if a contract allows you to get out, there may also be certain things you have to do in order to fully protect yourself.  An attorney can review and let you know these steps and what you’re entitled to.  As just a final note, while your realtor is an excellent source of information, he or she is not an attorney… but, maybe just as important, they have an interest in the deal going through so they get the commission.  Best of luck.