labour won't fully start

Woke up at 3am yesterday with backpain thinking I slept weird I try to ignore it and fell back to sleep woke up at 5am and had get up for the day because couldn't ignore it. That lasted to about 8 then all stopped so carried on with the day.

I started to get contractions and back pain about 4pm in the afternoon it started get worse about 8pm in the evening so I went to bed woke up at 11pm with period pains and back ache again took some pain killers but didn't work so at 12 30am I took a bath then got back in to bed the pain continued for about 30mins I then fell asleep and woke up this morning with no pain and feeling fine. Haven't had a show yet or anything . Has this happened anyone else?