Positive pregnancy test than negative the next morning

I took a pregnancy test around 8pm with only a 3-4hour hold I seen a faint positive and decided to test in the morning thinking it be darker. the next morning I had a very long hold and tested it was negative what does this mean? Should I test again tomorrow around 8pm? And not first morning? Does this mean it’s a chemical pregnancy? Also the test are both first response early results so they are the same test