Scared

Okay I've been TTC for about almost three years, one year in particular where I went one month without my period which made me happy cause I thought I was finally pregnant, bam the beginning of the month after that AF came I was heart broken. Now its happing again I'm six days late the only difference was that this time I found brown discharge I'm scared to think I'm pregnant cause I don't want to get heart broken waking up to AF :(