Do you think this could of been a stroke?

Hi all, my dad who is 62 suffers from type 2 diabetes. His blood sugar level went down dangerously low on monday night, and he was hallucinating, fitting on the bed and very very confused, crying etc. Ambulance was called and he was taken to hospital. They gave him a glucose drip through iv, but it dropped again last night, so they are continuing to monitor him. He is talking normally now but his voice is a little funny. He is also crying when he is talking to me, something i've never seen him do in my 29 years. He isn't like this normally. I was talking to the diabetic nurse in the hospital today, and she said she is going to have a chat with his doctors in the morning, as his response is kind of slow. Like when he is talking etc. He also is crying unexpectedly like if he is telling me something about regular things, he just bursts out crying. His grandchild visited him today, and when he made my dad laugh, he laughed but then it turned into crying. The nurse said he is like someone who has had a type of stroke. Is this possible? And have what i have described here sound like it?? And if it was one, will his personality always be like this? Any info on this would be greatly appreciated, thanks so much.