Do my blades need sharpened?

Right, i skate once or twice a week for about two hours each time. So, ive spent about 44 hours on the ice scince the last time I sharpened them. I didn't think they were that blunt until today until i was doing some outside and inside edge curves, and the blade kept sliding in a different d than i was going. My blade sometimes did that on other things, but it was really noticeable today. Should I get them sharpened?