Pregnancy symptoms or just my imagination?

I would like to be pregnant soon. My "period" was about a week late, lighter than usual in flow and color but still lasted about 4 days. I eat healthy, take prenatal vitamins and have a very little stress so i'm not sure why it was late. My have been sore for about two weeks and the areolas have gotten bigger and darker. Today I had horrible nausea and almost puked twice. The past three mornings I've felt queasy. I am quite little 5'3" 100lb and my jeans are a little on the tighter side. I watch my cycle carefully and tried to time my ovulation. But I am very good at imagining pregnancy symptoms. I also took a hpt a day or so ago and it came up negative. So, opinions please, pregnant or not? My hubby keeps saying I am or I might be but I'm not getting my hopes up. Any suggestion to help the imagination? If you need more info say so... (sorry if already too much)