@caribeandiva ,
I was looking at your last, posted hair pictures. Your hair grows very long from the nape. It looks like the middle part of your hair, in the back, might be vulnerable to breakage. Would you consider sectioning your hair in the back, at night? Perhaps, instead of parting your hair down the middle , maybye do a center braid or section. That way, that vulnerable hair is cradled and not stressed. I've seen your hair drop down your back, to your bra-strap. The trick for you is retaining that super long length, indefinitely. Does it make sense? For example, in the back, instead of parting hair down the center and having two braids, you would section the back in three parts. Where you would usually have the part, make that section a braid. Let me know if this is not clear. I can draw a picture or maybe find a video.
I think if you can find a way to protect that section, you will not only hit below bra-strap (again), but that section will thicken and continue to lengthen. That's the pattern I notice with your hair.