Not feeling good since yesterday

Tree • Married 10.19.12-babygirl 3.22.18-son 3.15.16 and baby#3 4.01.19

Yesterday my stomach wasn't feeling so good, today and yesterday when I eat I feel instantly nauseous and almost gagging when I take a bite..today is the same besides my stomach feels alright but feeling like I'm going to get sick and light headed/weak ..my hubby and I are ttc but I jus came off af a few days ago..not sure if I should make a docs appt or see if it goes away..

Any advice would be good if not no worries..