You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

Continue with regaine 2 percent twice and follihair tablets till you can have a follow up with your dermatologist. This takes time. Shampoos don’t improve hair thinning in any way.

You should take few sessions of PRP Therapy. It will help you in regaining your lost follicles and strength the weak hair.

I need to see the quality of hair as well as the scalp . Please send me photographs of the hair root after pulling it and the photograph of the scalp

It would be really helpful if we do consultation. I have my own protocol for this issue. Generally speaking using a mild shampoo followed by conditioning is part of my advice.. avoid blow drying, ironing etc