Preg concern

Ok, in Oct I miscarried my first pregnancy (twins). I am 36 and have a bicornuate uterus. About 2 weeks ago a got a plus sign on an early home preg test! I'm so grateful to now be 6 weeks and 4 days preg according to my chart. The last week I've been consistently nauseous all day everyday. But last night, I was able to eat a burger with no nausea. And today only very mild nausea. Should I worry? Boobs feel gigantic and sore still. Not as tired as I've been either though. Thoughts? My first Doc appt isn't until June 6th but I've been chatting with a midwife.