The main task of the septic tank is to physically separate the incoming waste into 3 layers: scum (floating on top, consisting mostly of soap, grease, and hair), solids (settled to the bottom), and liquid (in the middle). The tank has baffles so that, when working properly, only the liquid portion in the middle can exit exit the tank and enter the leach field. The liquid entering the leach field is NOT clean; if it finds its way to the surface because the leach field is clogged, it will stink. When the leach field is working properly, the liquid sinks into the soil, and is acted on by various microorganisms in the soil to clean it.
If the OP has septic waste finding its way to the surface in his leach field, he's very likely not going to fix things by just having the tank pumped out. It's too late. The leach field has already failed.
In his original post, the OP stated he's been living in the house for 5 months. He did not state whether he bought the house 5 months ago. In many states, it is required by law that the septic system be inspected and pumped before a sale can take place.
The OP also seemed to be completely unfamiliar with living in a home with a septic system. Perhaps he's flushing wet-wipes down the toilet and dumping paint and other inappropriate materials down the sink. Maybe he installed a food disposal in the kitchen sink. Maybe he installed a water softener and is running the discharge water to the septic tank.
Once the leach field is damaged, the cost of repair can be several thousand dollars.