Hi...I just had my first baby last month and I too had the same question.
A contraction was like having someone sinch a belt tightly around your belly while you have mynstral cramps. Once the contractions get very strong it feels like you have to poo...which you might.
For me it all went down like this...I woke up on a Wednesday am with what felt lke period cramps which I thought was odd being pregnant and all! I woke up and went to the bathroom and had a poo which was kind of watery then had to pee...I know TMI. When I wiped there was blood on the toilet paper and I knew that this was my mucous plug. I had contractions from 7am until 6pm and they were between 4 and 7 min apart. Some contractions were very strong and some were less intense.
When we got to the hospital they sent me to the triage unit to assess me and I was only 1cm so they sent me home. Almost 12 hours of contractions and only 1cm I was so bummed. So my advice is don't run off to the hospital at the first twinge.
So I spent the entire night getting more and more inense contractions and went back the next day at 9am. It sucks because I couldn't sleep, and I was hungary but try eating when your riding out contractions! But when we got back to the hospital I was 5-6cm so thank god they admitted me!
I opted for the epi so that I could get some rest...It was WONDERFUL! They dont give medals to women for natural child birth so take the medication if you feel you need it.
After a while the contractions got even stronger to the point that I wanted to push because I was feeling so much pressure...not pain but pressure. So the nurse checked me and I was ready to push.
For me pushing was a relief. It honestly felt just like going #2.
In my case I pushed for about 2 hours. My little munchkin was just a little sideways but the Dr. felt that it would be easy enough to deliver vaginaly but my contractions needed to get stronger so they uped my epi and let the contractions push him down.
To make a long story short I ended up having a c-section because when the nurse came back in to get me pushing again my cervix had come back over a bit ...The Dr. said she had never seen that before. I was thinking "great...just my luck."
The c-section was totally not that bad.
It was all totally worth it!