5 weeks pregnant and already gained weight! 😞

I'm 5 weeks pregnant, very hungry all the time and I have already gained 3 lbs. 😩 Im very happy that I'm expecting 🤰🏻😆 but it's upsetting to know I've gained 3lbs in 5 weeks and I can only imagine how much more weight I will be gaining through the rest of my pregnancy. I have yet not started any vomiting but I did star nauseous. Is anyone else going through this or has gone through this?