hey girly! Calm down everything will b fine u will make your goals! I'm not natural, but my daughter is and I think shes a 4a as well and although I know naturals need less protein as us relaxed heads, I give her a few doses every now and then anyway. Sometimes I deep condition her with heat for 30min with shescentit fortifying mask. Its protein and moisture, but more moisture than anything. Also whn I deep condition her with just a moisturizing dc I spray some aphogge green tea and keratin on as her leave in and her hair has no breakage at all since doing this. Furthermore, if u wear your hair in a protective style like a bun or someting, alot of people tuck the bun under and put their ends under their scrunchie (does that make sense) and I think that puts more stress on the ends of the hair causing the last few inches to have a breakage problem. So if thats what ure doing, I think u should explore different ways to bun or find a new protective style.
Thats all I got for right now, hopefully others will chime in and offer more advice. Good luck JC