Leaving the country one is working in for Deeni reasons

Q: I am from Pakistan and I am working in Dubai since 18 months. I find it always very difficult and disappointing to stay away from parents and brothers and sister. In my country I can get a job but it pays less than the job in Dubai. I have decided to leave and go back and work there on less salary than here and live with parents and brothers and I am also getting married soon in my country so I prefer to stay with all family and work on less salary there instead of staying here in Dubai away from them. My question is that according to Islamic teachings, am I taking the right step? Maybe this question seems little bit stupid but it holds great importance in my life as I want to follow my Deen in every aspect of my life. Please answer my question and help me to put an end to this confusion.

Interest based saving scheme

Q: My father has passed away and since I have no brother, the only source of income for my mother is the monthly payment that comes against the amount deposited in the saving scheme. As it is an interest based scheme, is it permissible for her to use such earnings for all her needs? She is over sixty.

Irregular bleeding

Q: My normal period cycle was around 28 days cycle or more. But few months ago I got a irregular period which caused problems for me. Now as from the past two months, I get a discharge on around 25th or 26th day as orange drop once maybe, then nothing till my 28th day, then my normal period resumes. So where do I start counting from the 25th or 28th?