Suggest Remedy For Severe Headache

My father (51 years old) suffered from a very sudden horrible headache on Sunday morning. He had to leave the room and go to a dark quiet place because it was so severe. Described by him as the worst headache he's ever had and he's had some really bad headaches (including migraines!). He continued to have the headache all day and wouldn't listen when we told him to go to the hospital. He was sensitive to light and sound and seemed to be acting a little odd (but not incredibly so). The next morning (Monday) he woke up with the same horrible headache and we were all still very concerned but he thought it had to just be a very bad headache.

Last night, he started acting a little more unusual and he said he was having a lot of panic attacks (he's suffered from many panic attacks throughout his life but they haven't been too often lately.) Anyway, he also told us that Sunday was like a dream to him. He remembered things that happened but it didn't make sense to him. For instance, we were all sitting in a room talking and he remembered it as all of us sitting in a room with ropes around us, talking about gigantic bottles of pills. That obviously never happened.

Him saying that worried everyone even more but he continued being stubborn. Later on Monday, he began vomiting. He would complain of a panicky feeling, then horrible pain, then he would vomit. We finally talked him into going to the hospital and I had to stay home with my little ones. He's there right now and all I can do is wait for phone calls.

So far they've done a CT scan and they found (I guess) some blood in the left ventricle (I think that's what they said, the phone keeps breaking up and it's making it even harder to deal with because I'm so scared for him) - They transferred him to another hospital and said they'll be doing an Angiogram. Does ANYONE know what's going on? I don't know what to do and I'm constantly crying and panicking. Thankfully my kids are asleep because it's hard to be strong right now.