Spotting on 3rd Trimester (33 weeks)

Woke up kanina ng naiihi, when I peed I saw my liner na may brownish discharge. Hindi sya tipong period looking, more on spotting sya. So ichanged my pad that was around lunch time today. Ngaun naman before dinner I went to the cr to pee and saw a bit of brownish discharge ulit gaya nun lunch. Di din madami parang spotting lang din. I don't feel any pain or cramping naman. My question is, should I rush to the ER/doctor or I can wait till tomorrow to go see my OB? Thanks. Ps: picture in the comment section po.