Has anybody ever lost someone to death and started having real bad panic attacks? Advice.

I have had anxiety since I was a young teen, but it was mostly social anxiety. I have never had panic attacks as bad as this before. My dad died. I have to help raise my little brother now, and I'm having panic attack after panic attack which isn't good since I have high blood pressure and asthma, too. Sometimes it feels like I'm dying like my throat is swollen. I had to go to the emergency room this morning around 3 am, and they were very understanding and gave me some anxiety medicine. I want to learn to control this on my own also without the medication. Please give me some advice.