ladiesss help a girl out!

OK so we've been trying to have kids. recently meaning starting last month I've been very nauseous, had my period a day late. this time I went I. for a blood test a week before my period. it was neg. but other test my Dr did came back as things showing pregnancy. period came a day late again last month and this month are the first two months it's ever did this I'm normally regular. this month only lasted 3 days. still nauseous back pain and breast tenderness can't go upstairs without losing breath and heart rate is up more fatigue and craving food I hate. even hubby is craving food he hates lmao. anyone have suggestions? Dr ordered a internal ultrasound next Wednesday.