Just need some closure really worried!

Poppy
So I found out I was pregnant about 5days ago and had to go to hospital because I was getting really bad tummy pains, they done a ultra sound and they said it was so small it was like I was only days, so they took blood and it came back 52.30mul/ml bearing in mind I haven't got a clue how far gone I am, they said I have to go back in 2weeks for another blood test and ultrasound, I'm just worried it's not right or something's going to go wrong. Can anyone give any advise? Or anything to put my mind at ease. 💜