8 weeks pregnant and feeling horrible

I am 8 weeks pregnant with my 2nd I feel like complete crap! 😩 I feel so different than when I was pregnant with my first. I have been having headaches every. single. day. My nausea has been SO bad and I have been feeling some discomfort not so much of pain but a little bit in my lower stomach. Is this all normal? I saw my doctor last week and he said everything looked perfect. Any thoughts?