Just first Momma Being Scared, need advice!

I'm scared I found out I was pregnant last week, I'm currently 5 weeks, in the begging I was so exhausted having to take naps during the day not normal for me. Now at 5 weeks I'm realizing at night is when I get my most nausea. Besides that my upper part of my vagina was so hard and my breast we're extremely tender and sore. Basically now the upper part and the tenderness isn't 100% there. I'm just scared I haven't had bleeding but I also don't want a miscarriage. When we did the insyno we didn't see anything at 4 weeks and 4 days but he said that's very normal! Please I need help!