You need more than a maintenance dose to build/recover your iodine stores, then you can drop down to a lesser amount. You can't do that with iodized salt. You can double up on the kelp product for a while. You can also find some vitamin products that have that much iodine, which will be cost effective.
If you record your waking body temps and then if low and you see them improve with iodine, then you have a good indication that you were to some degree experiencing a functional iodine deficiency. Note that some have thyroid function problems for other reasons that cause problems whether iodine intake is adequate or not. In any case, you do not want to treat an iodine deficiency with thyroid drugs.
You did not indicate what your iodized salt intake was. Note that sea salt does not contain iodine, lost in the process. There are some iodized sea salt products.