Im flying to brazil in march. Im terrified.

I have never had a fear of flying. There was a period in my life where my family would travel a lot but we recently moved back home. I am now scared of flying for whatever reason. I have OCD so I get a lot of irrational fears and this is an 8 hour flight. My mom told me about the accident in DC this morning and im getting extremely anxious even though this flight is more than a month away. I know seeking reassurance is probably not the best way to go about this but I can really use some help. Thank you!