Yes, I can relate. Altough I'm not a doctor I don't think that these thoughts and feelings relate to much to OCD, but OCD and or other diagnoses/syndromes might make these feelings feel more real and up close, thus being overwhelming. I get emotional very, very easy. If I listen to a sad song, I can cry and get depressed and after a few more songs I start thinking about suicide. I believe some syndromes may enforce any feelings that you/I feel to become stronger and overwhelming.

Often when I start thinking about my mom and dad, and I guess my two sisters, I feel guilty. Like I've done something and I need to make up to them. I start thinking about how they have raised me, and supported me my whole life, with love, help, food and money, and here I sit infront of my computer ignoring them, knowing that one day they are going to parish and die. It is very easy to forget how much your parents have done and been through for you, but when you get reminded of it I think you get a guilty feeling, among others, and they become stronger because of whatever syndrome/s the person has.

Anyways I hope what I've writen makes sense...

By the way, I like your quote in your signature.