Not sure how to feel...

Yesterday I found out that my Bio Dad has been in the hospital for over 1 month I guess he split a pot of boiling water on his legs- and has had major skin graphing done And just started walking again the other day... I dont know how to feel about this/what to think or what to do. Quick recap my Dad and I never lived together, but i visited regularly etc and it was good My Dad has always had a TERRIBLE temper- scary to a point A few yrs ago I called and asked if he wanted to come Over for a fathers day BBQ. He said he already had plans (im his only child) and I was ok with that. My car died- and I had no vechile for 2 WEEKS ONLY. During this time he called and asked me to go to his house (3.5 hrs away) and I said I couldn’t really afford a bus ticket (200$ return) As I was saving up for the car and first and last for insurance. He got IRATE told me to never call him again etc. I did a few times and got no response- He then 1 yr later called my cell phone – I was driving and it is illegal to talk and drive in Canada So I let it go to VM When I answered it was the harshest message I have ever heard or received from anyone Telling me I was nothing to him, he didn’t care about me or my life, to never phone him and basically I was dead to him and no good So I phoned back- he said “Im on the phone with your Grandmother call me back in 5” So I did- he never answered and that was that – I page him on holidays – he has no direct # and I have had to page him my whole life Then I find out this- wish I could have helped or made it better or visited or called- but nothing I am contemplating calling him today and leaving a message on his pager of “hope you are getting better quickly, love Marly” But I am still unsure Advice anyone!?!?