Hello I Just Delivered A Baby Last February This Year...and

hello i just delivered a baby last february this year...and know i found out that it is positive...i am delayed for 1 day..i cant manage to take care 4 chilren spcially my youngest is just 5 months old..and i am having functional regurgitations of the heart..im so worried now becuase uring my last deliverey my ob warns not to bear a child anymore