Please dont read and run 🫶🏼

So im ttc for my second, my first little one was conceived with help. Yesterday 8dpo I know super early I had a super faint line on a test docs gave me to take home! Everyone on the line eyes confirmed it looked positive. Took a morrisons own brand today and it was negative. What one could be wrong? Shall I just ride it out and wait until a missed period? Anyone else experienced this and been pregnant? Please tell me your stories ☺️ just a girl hoping to expand her family because can't afford fertility treatment 🤍