Hello! So I'm 5 weeks 1 day pregnant, per this app. I took 2 tests on March 10th&11th and both spiked right away as pregnancy. The day I ovulated was March 26th. My HCG level on the 12th was 502 and 1400 on the 14th of March. That would have been in week 4. High, right? Is this the reason for my constant feeling that I'm going to get a head cold? I never get sick, just headaches to the point where I feel like it's a sinus infection (no runny nose). No fatigue (unless that's fatigue), no vomiting...I know my immune system is working overtime, but it's day to day around noon, and my only cure is sleep at 7pm after work. Has anyone ever had twins where they had these symptoms and high HCG levels?