Okay so I have had morning sickness constantly this whole pregnancy , everyday , apart from this…

Okay so I have had morning sickness constantly this whole pregnancy , everyday , apart from this last week I haven't needed or had the urge to go and be sick which has been fab! , but yesterday I was randomly sick .. And then this morning I was sat doing my little girls hair , had to stop run to the toilet and be sick I didn't even make it to the toilet !! , any ideas why I'm suddenly being sick now and again when it had only just calmed down ?!! 😑😬