What kind of discharge is this?

So I’m 11 days late. My period is typically irregular but for the past few months I have been getting a period. Yesterday I noticed brown discharge on my panties so I figured it was old blood and I was starting my period so I threw a pad on. When I got home last night I noticed there was nothing on the pad so I was like okay maybe it’ll come tomorrow. Well this morning I obviously had a new pad on and I saw nothing. Well I’m at work now and I see this yellowish/brownish (it almost looks pinkish) discharge on my pad. Any ideas? Is it a sign of pregnancy? Am I starting my period? Not on birth control, my boyfriend and I use the pullout method, and I have not taken a pregnancy test yet cause I hate getting my hopes up.