Is this morning sickness?

This might seem like a bit of a daft question considering I already have 2 boys but I woke up this morning and was really hot and uncomfy. I went in to the toilet after my husband had made a smelly smell (u can imagine what I mean!) And the smell made me heave over the sink (no way I was sticking my head down the pan so soon after it had just seen some action) after that I had some water and for the rest of the day I've felt totally fine. It was just very strange as I'm NEVER sick in the morning unless I'm really unwell. I'm just wondering, what does morning sickness feel like as I never had it with my 2 boys. I also had a period a couple weeks ago but it was light and clotty, very unusual for me.