3 days overstayed but still valid visa

I have a 1 year M, multiple entry exit every 30 days. Currently living in Zhuhai but I have overstayed my exit by 3 days. Should I just attempt to cross over to Macau and pay the consequences there or try to deal with it through the PSB. Its a holiday so I cannot find local advise through administration but I have to deal with it. Can work it out at the border crossing?. Any suggestions would be appreciated.