Is my piercing irritated or infected?

I pierced my ear the other day, on the lobe where it starts to turn to cartilage. I did it myself, with a professional needle and sterilized it good (I've done the other two piercings on my lobes myself, and have had absolutely no problems. My sister got her's done professionally, and they both got infected). But now the piercing is a little swollen and a little red, and it hurts when I touch it. Its not oozing anything and its not warm to the touch, and the swelling and redness aren't that extreme. Also, I have been cleansing it 3 times a day with piercing cleanser my sister got at Claires when she got her piercings. Is it just irritated, or infected?