Appetite?

So lately I've been kinda up and down depression wise. I'm trying to lose weight and trying to eat gluten free and reduce sugar (I already eat pretty healthy) anyways lately my appetite has been crazy. Some days in hungry all day and others I'm not so I get busy and forget to eat. Today was kinda scary because I forgot to eat lunch and I got really car sick and I was weak, nauseated, light headed and my head hurt and felt really heavy. So my husband asked me why I was feeling sick and I snapped that I didn't know just cat sick and he asked when I'd eaten last and I was like idk because I felt too sick to think about it and he said he was going to buy me some food (we were driving) and I was like I'm not hungry I'm sick and he asked when I had eaten last and what I ate and I had to think about it and I'm like a banana 5-6hrs ago and I was mad at him for making me get out and go get food when I didn't feel well but after I ate I did feel better mostly but still a little car sick.

Anyone else experience this? It's never been much of a problem before because I love food lol which is why I'm overweight.