Leave to remain,flr please help

i came to uk as a student in 2013 ,married in 2014 and my wife gave birth to our daughter,shortly after i applied for leave to remain under the 10 year partner route as we didnt meet the income threshold,it was granted for two and a half years, i have lived with the wife three years now,but recently we seperated ,no divorce no nothing yet as it just happened 2 weeks ago,she has just taken the kid and gone back to her parents.my leave to remain expires on September 30 so in 15 days,and i dont think she is willing to support my application,she wont even talk to me,and she took all her correspondence with her.what are my options

i am 23,full time work but not a job that would qualify for a visa,daughter is 3 and another kid coming this november