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After going through your history, you are having Hyperthyroidism
that is overactive thyroid and,This is great that you are feeling better you need to monitor Thyroid function and medical check up periodically.
Your age is 20- 21 years by this time growth plates in long bones are already fused and any increase in height is unlikely.
This is more important to be healthy. Please do not worry about your height.
Taking care of diet and good fitness through exercise and may be use of high heel shoes for short time only can help.
There are some surgical ways to increase height can discuss with orthopedic surgeon who deals with this surgery.Antithyroid drugs
needs special care during pregnancy
so take care and if surgery of Thyroid is possible and that can cure or later on supplement with thyroxine
may be required.
Dr.Akhilesh Dubey M.D.