timing contractions

when it comes to timing contractions do they have to be the really unbearable contractions or just from the mild hurting ones as i keep getting regular contractions but they are never too painful they are bearable pain as such ...over due by 3 days now and had these on off regular bearable pain contractions daily for the last 3-4 days they seem to be worse and more frequent in the evening but gone by time i go to bed