What are the effects of a child age 13 who discovers her dad dead of a sudden heart attack?

What would be the recommendation for this child who went through the trauma of finding her beloved dad dead of a sudden heart-attack? I am the 13 year old who is now a 32 year old female who has not gone through counseling but has difficulty with a multitude of problems that arise when high stress is involved. I am going to see a psychiatrist tomorrow, but wondered what long term affects can be caused with this? I have overall anxiety issues with people in general, but especially the opposite sex, and those who I may be in a current relationship with. I tend to push away after getting close, however, don't wish to, but can't help it.

Any suggestions or information would be appreciated!