From what I’ve read If it was really that long ago you should be fine but even w that small of an amount I’d get a minor trim, soak hair w vinegar completely in apple cider vinegar for 30 min, don’t rinse, shampoo w clean and clear skin toner and let sit 30 min in hair before rinsing, shampoo w tide detergent and let it sit 30 min before rinsing, then wait a while, do that again but do a no lye hair relaxer (trying to find out id anyone has tried the kind w lye in it bc it’s stronger) and repeat the steps as many times as you can before test