Urine test faint line, blood test negative 😢

Alejandra • 19 yrs💍. Mommy of 🙎🏻‍♂️🙎🏻‍♀️💁🏻‍♀️...👼🏻👼🏻...👼🏻vanishing twin...TTC 🌈 baby...🐶🐶🦎🐠

Has anyone gone through this. I took a urine test last night and saw a faint line. This morning I took 3 Tests! and two came out positive (faint lines) and one negative. Went for a serum pregnancy test and it came back negative. I really want my rainbow baby. Am I on the way or do I have to keep trying?