Dolomitic lime is calcium magnesium carbonate. It has something like 20% calcium and 10% magnesium.
Pre-mix dolomite lime in your soil next time around. At this point and time what you could do is PH your next feed at 6.8 to balance your soil and finish at 6.5. It takes some time for the dolomite lime to dissolve and neutralize your soil PH level therefore if you are considering adding it now you'll need to buy the powder.