Help!

It may be the time! I hope 😅 ok so yesterday i was 7 dpo. And i tested. Vvfl! It was definitely there! But suuuupeeer light. Almost so light that it could have been a shadow or evap line. But my breasts are sore and i am so so tired. I have been trying for 6 months now and I wonder if it's possible that I'm pregnant and it's just not showing up so well yet. How early could you first detect pregnancy? What is the best test to use to detect a very early pregnancy??ohhh my nerves 😅😭😭