Need advice

I haven't been feeling well these past few days. Yes I'm pregnant and yes there are women out there that are sick their whole pregnancy.. so let my give you my symtoms and see if I need to go to the doctor or not. I'm nauseous all day every day, having a hard time breathing, my heart is beating harder than normal, fatigue, constant headache all day today,sinus problems and body pain. No fever and haven't thrown up and no bleeding. With everything I'm going through should I go see the doctor or is all of this completely normal with pregnancy?

Reason why I'm asking is because this baby number 2 in twelve years so it's been a long ass time since I have done this and I don't want any harm to come to my baby. Btw before you ask I'm 16 weeks today. Sorry for the long explanation.