If the property is a listed home, then the seller's agent is offering compensation to whichever agent brings the buyer. This is called a co-broke. I'm not sure if you signed an Exclusive Right to Buy agreement, which will tell you whether or not your agent is charging you an additional fee besides what the seller's agent is willing to compensate them. If this is a FSBO property, your agent would spell out the terms there as to how the compensation will work. I know many agents that do not charge their buyers any additional fees and are completely happy with the seller's agent compensation.
The seller pays the commission and in most cases the buyer does not.
If this is the scenario you are in, I'm not sure why you wouldn't want to use your current agent and have someone representing your best interest. If your unhappy with your current agent, I would recommend communicating that to them honestly.
I would recommend you use a professional Realtor to handle your best interest.
Deja Lett, Realtor
Assist 2 Sell Home Team Advantage
13 Park Street
Saco, ME 04072