any thoughts?

Hi semua. I'm new. I'm 24. Have missed my period for 21 days. Did some pregnancy test tapi negative (actually got 2 lines but the other one blurry- according to the test guide it should be negative). But I did do check-up with doc, and he said that it's still tiny but it's there (since baru 4weeks so it's hard to see on the ultrasound) so he say that I'm pregnant. However, I still don't think that I'm pregnant (feel mcm tidak yakin) cause I don't have this pregnancy symptoms. I'm so confused, I don't know what to believe. Do I need help or something? Any thoughts? Thank you ?❤️