i get a weird feeling like something is wrong and its making me really depressed?

[tac_0121]

well, i have been getting this feeling a lot for some reason and i have been getting them for years now but its actually getting worse. when i get this feeling i start thinking about my family and wonder if they are all ok, i start thinking what would happen if something happened like a murder than i start thinking about how i would handle it.. but after a wile of thinking about it i make myself really depressed but here is the funny thing..i love my family to death and non of them piss me off so its not like i don't want to be around them but every time they come over i get super depressed and just want to be by myself ..i really want to get over this because my cousin told me my mother was crying because she feels bad for me but the same feeling came back on my birthday about a month ago and my hole family saw how i was acting i guess and now they are all worried..they never said they were but i can kinda tell because they are all saying if i need to talk to them i can call them any time and asking me if their is anything wrong..but anyways im tired of making my family upset because of this stupid feeling and i would really like to get over it what should i do?