Morning Sickness Returned?! What?!

Samantha
So I've hit 12weeks this week, but have been free of any nausea for nearly 3 weeks.... until this morning 😭
And it's back with vengeance!! I have spent the last couple hours hugging the toilet, and my rib cage and oesophagus have never been so sore!
Would it maybe be because I was freaking out about a job interview I had today (had to reschedule my first interview ever!), or can I blame the Nutri grain cereal I had for breakfast? Mind you, breakfast went down a treat!
Has anyone else gone through a come back of morning sickness?