Can someone explain this to me please?

Hii, so this might sound crazy so, I did 3 pregnancy tests before my miss period, then when I was 2 days late I did the digital one who said I was 1-2 weeks pregnant, so I went to the doctor last week, and I did the first ultrasound, and I didn't see anything 😔, I also did the hcg blood test yesterday and I didn't get the results yet, don't understand anything about this, this is all new to me, I never had a baby, and I was trying for years, so, can someone tell me if I am or not? Thank you, and sorry for this question....I'm new at it, as it seems I'm pregnant of 4 weeks. I really want to be a mother...