Has anyone else experienced chills am really worried

hiya I'm 15+4 weeks and for the past 4 days I've been getting chills (no fever)all throughout the day even though it's very warm in the house. I can't get through to my midwife and when I saw my gp yesterday he didn't seem at all concerned just gave me a blood test for anemia and diabetes. I've read the it's very dangerous so im so confused. Can anyone help?  Thanks