First IUI cycle

Today I am 12 dpo (been trying without help for 2+ years) and today I was very hopeful for a positive result.

I got a negative on a early detection test (10 UML HCG) I also feel like the indent line is maybe messing with my eye sight… either way I started having some light discharge today (brownish old blood no clotting very light)

Should I still hold onto hope that this is maybe implantation bleeding or is this just my period starting up. (My period is due to come this Sunday April 2)

Thank you in advance for any advice, words of wisdom, or personal experiences shared.