Urine test faint line, blood test negative 😒

Alejandra β€’ 19 yrsπŸ’. Mommy of πŸ™ŽπŸ»β€β™‚οΈπŸ™ŽπŸ»β€β™€οΈπŸ’πŸ»β€β™€οΈ...πŸ‘ΌπŸ»πŸ‘ΌπŸ»...πŸ‘ΌπŸ»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?