Hair grows approximately 1cm per month. Its a myth that cutting your hair grows faster. I guess 4 inchesof hair growth is good enough for 7 months.  But sometimes hair length may be genetically determined and when nutritional deficiencies etc. So hence have balanced diet. You have mentioned that you are having female pattern baldness which could be due to PCOS or hereditary. Continue the medications prescribed by your dermatologist. PRP injections also give a good result.