What are the chances of me going to jail during an arraignment?

Arraignment in a couple of days in court on my 2nd DUI. I got my first dui in a different county on court supervision.... Wasn’t accused the second time of anything serious, just for using the lane and driving under the influence .... I do not know what to expect on my arraignment on my 2nd and I would be alone because I do not have a lawyer or PD yet...
yes everybody just keeps saying get a lawyer but I just can't afford the exorbitant initial fee .... When I was arrested on my 2nd, I posted my own 115 bail.