@dawn16 Hi! Couple of questions: are you anemic? If not, I wouldn't worry about it. Second, how are you supplementing your iron? Through over the counter stuff, or with a prescription? Most over the counter stuff is very low dose, so that might explain why your ferritin level stayed about the same.
If you're not anemic, your iron stores (ie ferritin) is sufficient enough, so I personally wouldn't do anything else about it. Some people, however, do feel better with higher stores, so you could ask your physician for proper supplementation for say, 3 months, and see if it does anything for you.
If you are however anemic, you would need proper supplementation and depending on your patient characteristics you'd need a workup. Consult your physician.
All the best!