retracting a bid/offer

[aurasoma]

Hello, I submitted a offer on an item and have not heard back from the seller in about 2 days now, the offer is about to expire.  In the meantime I would like to retract my offer because I found the item cheaper than what my offer was.

I read under what circumstance I can retract a bid/offer, my reason is not one of them.   Should I wait out the time period or do you know if I can retract my bid since the seller has not declined or counter offered yet.

thank you