First time mom question

sarah • 21 🌹 Lillian born 8.4.19 🌹engaged

I’ve been having trouble eating as I’m in my 7th week of pregnancy. I get hungry but I can rarely eat without feeling sick and will often get very hungry but unable to eat. Today I have eaten although probably my enough. I am now feeling weak and got tired just from standing too long. My heart is also racing (note: I have a faster than normal heart rate anyways). Should I be worried? Should I get checked out at the er? I do believe it’s mostly due to lack of food and lack of sleep because I have been waking up due to having to pee and bad dreams and since I got a cold a few weeks ago I have not been able to sleep past 7:30 unless I sleep with my boyfriend which I rarely get to do. Please help