I'm not diabetic, but i have had hypoglycaemic attacks, the past few days. help on monitoring this please read?

Yesterday my bm went down to 2.4, and then they gave me glucose, and then it went up to 4.6, then i got discharged from a&e at bm of 5.2, now this morning when I woke up my bm was 3.6, after i ate breakfast, it started going up and then got safely to 5.2 / 5.3 ish at 2pm today. now i'm out and i don't have access to carbs and food until 7.30/8pm (if you really want to know why i will tell you, ) but anyway, i'm scared that my bm will go as low as yesterday. do you think that will happen? baring in mind at 2pm i last ate and it was 5.2 30mins after eating.