What's going on

I'm 8 weeks and 6 days and I have worked 12 hour shifts before I got pregnant without issue. Lately, if I work 3 of them in a row I get so exhausted on the last day. Yesterday I ran a fever and had the worst headache ever. When I was standing for long periods of time, I got lightheaded and my vision was starting to get blurry. I was honestly afraid I would faint in front of everyone. I got off and my entire body hurt badly I felt like I had the flu. I didn't eat or drink much yesterday because I felt very nauseous and just wasn't hungry. I slept over 12 hours last night without eating dinner because my food aversions were terrible. I was afraid to eat something and puke because of the smell or taste. Now today I woke up feeling better but I am still lazy and not wanting to get out of bed as I am starting to have nausea again. What is this? Am I just really emotionally and physically tired or is this how morning sickness is? I haven't vomited but I nearly feel like I will any minute. Should I call my doctor? I haven't been to my first appointment yet. I'm just scared because I feel like I need to stay in bed because when I get up I feel so weak and sick.