exhaustion beyond belief


hey ladies! I'm currently 7 weeks and 2 days.(my 1st pregnancy) I have an ultrasound appt tomorrow to check for the heart beat. I'm nervous and anxious as all get out but I'm super excited. but I'm struggling with the fatigue. I average about 10 hrs/night and sometimes a 2-3 hour nap. I'm drinking almost a gallon of water a day, I'm eating smaller and more frequent meals but I'm EXHAUSTED!! I also work 3-4 days per week as a server and that makes me even more tired. I'm also exercising 30-45 mins per day. How in the hell do i combat the fatigue. I'm tired of being tired. HELP!!! And TIA 😁😁😁