Hair loss and. I also use oil with it?

I had very thick hair in childhood then from teenage i started to loose hair alot and it became very thin i did allopathy started minoxidil then left it a month later bcz my friend told.me it willl cause more hair loss then did homeopathy then ayurveda then again homeopathy last year my partition was so vide and my scalp was very much visible so started rosemary water spray and it did helped me initially then took nutritional test and had supplements for my nutritional deficiencies too ... now again starting with minoxidil ... thinking of using it derma stamp ... my partition part is very wide ... do i have to use it for whole life ??? How much hair will i get back ??? If in pregnancy or during lactation i stop it will it cause me to face irreversible hair loss ??can i also use oil with it??