Middle of the night hunger?


So i just turned 5 weeks and 4 days and for the past 2 days, I’ve woken up in the middle of the night/early in the morning feeling like I’m starving to death! Last night i woke up and felt like i was going to throw up, i was so damn hungry! I didn’t go to bed hungry so i really don’t understand! With my first baby i didn’t get any pregnancy symptoms until my 3rd trimester. Nor was i waking up in the middle of the night until at least 4 months! Has this happened to anybody else?