Ihave a bit of a problem with the folowing : What would you have done,if your girlfriend told you she had got a new boyfriend? I would own my own house today ,if Ihadn't foolishly given the other one away. Ithink they are mixed conditionals but not sure,please help me !
The concept 'mixed conditional' refers to making hypothesis about how something that actually happened or didn't happen in the past would affect the present, so you need different time references in the main clause and the condition. That's why I think your first example is not ok, it should be: What would you do if your girlfriend had told you she had (got) a new boyfriend. (present time if-past time, time not tense). The other one meets this requirement and, to my mind, it is ok. (not a teacher, though).
If I had studied medicine (past time), I would work in a hospital (present time)
If I had studied medicine (past time), I wouldn't have met my wife (past time).
Hope this helps you.