pushing in wrong spot? please read I'm scared

Pushing in the wrong spot? What does that mean? I'm confused 
I gave birth almost 2.5 years ago and they had to use a vacuum to help my daughter out as it took over 3 hours and no progress pushing. I kept pushing and pushing and I guess I was pushing wrong? 
Well in about 2 months I'm due. I don't want this to happen again. What can I do? I didnt even know pushing wrong was a thing. 
I was all natural no epidural or anything. 

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