Second pregnancy different than the first

Hope • Mama to a beautiful 2.5 year old. Expecting baby #2 1/31/2020

So, I’m 7 weeks and 1 day pregnant with my second baby. I feel totally different than I did last time. I’m hungry all day everyday. I had all day morning sickness before and so far all I have had is nausea that might last a few minutes a few times a day and it goes away. My breast are super sensitive and I can not get enough sleep. Is this normal?