I wouldn't wanna lie abt contractions as I rather prepare u as a fellow mummy. It is rather very painful that's why alot of mummies will opt for epidural. If u have high threshold of pain, likely u would be able to handle it. Breathing techniques helps too. For me, I got menses cramps and it's quite painful but my first labour contractions got me at a surprise as the pain was indescribable. My second I was on gas but still almost black out, and now my 3rd, I hope to brace thru it again well.
Oh and yes it starts of mild but do time ur contractions. U may wanna download the app and then if it gets rather close less ard 10mins apart u should be on ur way to the hospital. All the best momma.