My (lack of) hair growth

I am NOT one of those natural hair girls who keeps track of their growth on a regular basis.  From time to time I'll  kind of just eyeball my hair to see what kind of progress I am making toward my length goals.
Something told me that my hair growth had slowed to a crawl over the past the year or so but I thought maybe I was just being paranoid.  I would still get the occasional comment that my hair looks like it's growing well but recently when I looked back at some old pictures in my phone I came across a picture of me exactly one year ago a little after Thanksgiving.  I was taking selfies in the bathroom and I happened at the time to do a length check where I stretched the front of my hair down and took a picture of where my hair came to which was to about my top lip. Looking back at this picture, I realized that my hair is at this point the exact same length it was on that day about a year ago.  I did the same length check which confirmed my suspicions.  This was very disheartening because I have put a lot of work into my hair and I haven't been doing anything differently. I have been protective styling and finger detangling. I have not applied any they or color to my hair and I have tried to be very gentle with it.  I came to the conclusion that I have reached a hair plateau and I may never reach my hair goals.  However, the optimist in me decided instead that it is time to rethink my hair regimen and to put a little bit more effort into reaching my goals.  What I have decided to do after reading suggestions online and looking at some YouTube videos is to start using my biotin again, start using castor oil on my scalp and doing scalp massages regularly.  I will also haba a more stringent  moisturizing regimen.  I have decided to try this for 3 months and see if I have made any progress. If so, I will continue with these practices for the year to see if I can get closer to my hair goals.  If not I will have to think of a new strategy or I might as well just go back to my regular regimen and accept that this is the length my hair will remain and just focus on maintaining health instead of gaining length.  Here it's a photo of my hair now.  I will keep you guys posted.