Obvious Topic; Am I Pregnant

So I can try and take a test in the next few weeks but until then I want your opinion. My fiancé and I tried for the first time 4 days ago (2 days before my period according to this app) to do a quick test run before I began my period cause after we’re going to begin trying for a baby. Well now I’m 2 days late for my period but have been spotting since yesterday but it’s very very little and it’s either a really light pink or a brown colour... am I just a little late or should I let my boyfriend know we may be pregnant already? I’m so confused...