Ok I have been working out a lot lately and I have this sharp pain when I use this abe mashine at the gym...?

I have been working out for about 4 or 5 months steadily. I am 17 years old. I have been taking Force Factor just recently. Let me describe. this mashine is great for working your stomach! So you put weights on the back of it and go from there. So I have been doing those occasionally. But then summer comes around and I want a beach body. So I for almost 2 weeks I was working kind of hard on my stomach. And now when I even try to use the mashine with just a little weight it feels like a screwdriver made pointy and sharp is coming from inside my stomach out. Even if I sneeze I feel it a little. Help me out here please I have to stay fit It is a absolute must! Thank you