The UCI starting with a CAN is a temp one. Once your application is added to the system, a 8 or 10 digit UCI number will be generated.
The meds can take 2-8 weeks to be passed. It will depend on when your panel physician sent the report to IRCC.
There is no such stage as IP or IP2.
All application go through the following:
R10 - completeness check
Criminality
Medicals
Eligibility
Security
See
https://bit.ly/2Qf0Sm6
The R10 is passed in the first 3-5 weeks, usually around the time when your medicals are passed. To know the exact date you need to see your GCMS notes, requesting which is not advisable this early.
P.S. Please do not post the same question on multiple threads.