Infected???

i got my belly on pierced 5 days ago, and now its like really sore and its red around the piercing. its not like my whole stomach is red or anything but its like 2 cenemeters around the piercing is. and i was just wonder if its infected? or if its just healing or whatever. also, if it is infected what do i do? cuz they told me to clean it with water and mild soap, or with distilled water and sea salt, and ive been cleaning it and stuff and they said if any of my friends say put neosporin on it or anything not to. so yeah i need some advice!! thank you. =)