Lightheadedness and blue lips

This morning I had another prenatal appointment, mostly just a check-up and full body physical. I'm eleven weeks pregnant btw. Everything was perfect and the doctor didn't have anything bad to say. Well after my appointment my mother and I went to two stores so I can try on wedding gowns for my wedding in November. The first store we went to was fine and after a few dresses I began to get really hot and feel light headed which is pretty normal and nothing I was too concerned about. I sat down and chugged more water and I was ready to go. This happened twice in an hour and then we decided to go to another store. At this next store, I tried on about three dresses then I felt like I needed to sit because I was so light headed and hot and the lady helping looked at me and was like, "omg, your lips are blue!" Then she ran to go get some juice, a wash cloth, and some ice. I was also pretty clammy feeling and was just miserable. After about ten minutes with that cool cloth on my head I felt much better. After trying on a few more dresses I felt  freezing and had goosebumps. It was the weirdest thing. My lips and face got their color back and I was back to normal though.