Is this normal or concerning?

I’ve been spotting the past few days so was expecting my period at any time. I went to sleep last night with some mild cramps, but was actually woken up by them at around 5am as they had gotten a lot worse. I couldn’t get back to sleep without going to the toilet, during which I realised I had properly started my period. It then took me ages to get back to sleep as I was cramping so bad.

Usually I do get quite bad cramps, but it’s never actually woken me up in the night before. Is this a sign for concern or quite normal? Usually when I start my period, I go to the toilet in the morning and it starts then, almost as if it’s waited for me.. but this is the first time it’s actually happened in the night.