what do contractions feel like?

Skye Rae • 💕Raelyn 11.15.17. TTC#2.

im a ftm and have no clue what im suppose to feel. last week doc said i was 1cm (have next check tomorrow) and been having pressure in my hoo hah like low period/bladder pains off and on. i hate not being prepared so was wondering if anyone could tell me what beginning feeling feels like?