And welcome, this forum is fantastic for advice and general chi chat.
My little one is 8 months, used to be very shy and skittish the best thing over ever done was not baby him. He walks he doesn't get carried about we also took him everywhere to build up his confidence now he's the most social dog outside ever. He's amazing, With her running away from you since she's only 4 pounds of a tiny little thing someone coming towards her probably terrifies her start slowly by bending down and getting her to come to you. Running up to her she's probably like omg help, she's still young so I'm sure shell get there you just have to focus on building trust. Pablo was the same now he's constantly walking beside me and doesn't run when I try to pick him up. Be patient she'll come round! Good luck