TMI!!! TMI! Implantation Bleeding?! (TMI)

So me and my husband have been trying to get pregnant for a while now and it’s always a negative every month. My cycle is regular and never delayed. Now I’m delayed for two days and there was some spotting. Dark brown in color yesterday but the second day it was light pink. Does spotting change color? My heart broke a little because now Im scared it’s just period. My period is normally heavy though so I don’t know. I really want to be a mom so bad! Anyone experiencing the same?