TJ Border X-ing & Clomid

Can someone give me the specifics regarding the legality of bringing a 90-day personal supply of Clomid through the Tijuana walk-through border crossing? I have a nice SUV, so I won’t drive in that crazy place! I think what I’ve gleaned from this site is that if it’s for personal use and it’s only a 90-day or less amount of drug, that it’s legal and I won’t have any trouble. I want to go to TJ this weekend and pick some up, but don’t if the border guards will hassle me. Do I need to show them a copy of the prescription or something (something I WON’T have)?