Vent

Hi Guys and Gals I've been hypoing since just after 11:30am today even though my BGs came back up around 1ish this afternoon kinda fell asleep at 1ish I treated it with normal coke about half a bottle so over the 15grams they recommend it still took a long time to get back into range. Anyway I woke up to my phone beeping hypo alert I checked and it was low via a finger prick again I've drank about 1/4 a bottle of coke about 30 minutes ago and its only just started to come back up after I had a few biscuits about 10 minutes ago anyone know why it took so long?