Is it normal to want to walk out of the house after a small disagreement with DH?

[CatLoaf]

We have two young kids, reliably in bed by 7. I'm SAHM and the main carer, but he helps a lot when when he's there.

Today he corrected my pronunciation on something Oxfors University related (he has experience, I don't - I'm sure I feel inadequate and shit, no higher education and a chip on my shoulde :( ) and I said I was going out for a walk. He was typing for ages on WhatsApp but now nothing. I feel so angry and guilty and lost and everything in between. I know I'm unreasonable for walking out (although a walk calms me down). I'm just feeling lost and shit in general, and have tried to tell him that

I feel like such a bitch this morning. I definitely went over the top - it was Michaelmas Term which he corrected my pronunciation on btw... I do actually know Magdalen :D
I think it's all my own lack of self esteem and resentment bubbling away, and it's horrible for both of us.