Welcome back! I too had a similar hair type to you and what worked for me was stopping the relaxers and really taking the time to give my hair time to recover by putting it away in a weave and making sure I looked after it under that weave and did not leave it for too long - When i first joined I tried everything but in all honesty what really worked was finding a simple regime, sticking to it and protective styling, now even my own mother asks me if this is my own hair everytime she sees it lying down my back! From looking at your pic, I see a lot of new growth which leads me to believe that once you start looking after it properly, your growth will be unstoppable. Goodluck!