Help with emotional issues, please

I have been really struggling with emotional issues for some time now and I am unsure of what treatment(s) to try. I am a 30 year old woman.

I am depressed. I was on Zoloft for depression when I was younger and it made me have no emotion what so ever. I'm not really sure what jump started the depression when I was younger. The depression now seems to have been jumped started by the birth of my twin daughters. I feel very sad the majority of the time. Physical affection(i.e. hugs, hand holding, general closeness, etc) seems to help me feel better for short periods of time.

I also feel very nervous all the time. I feel a tense sensation in my body all the time, it never goes away. I worry a lot, about pretty much everything.

I have a hard time focusing on things. Even this is taking a really long time to type because I keep getting distracted in my own mind.

I often get really excited about certain activities, ideas, etc. but I don't actually complete them and then I become depressed from that.

I plan out things a lot. If things don't go according to the plan in my head then I get very upset/angry.

I am quick to anger and get angry about lots of different things. And I get very,very angry about them. I seek solitude when I become angry and will sometimes throw things(but never at someone else- only alone.)

I feel very isolated/alone. Even when surrounded by my family.

I am very defensive and overly sensitive to criticism. I often feel like a failure or that I am failing at a particular thing.

I have a social phobia that started after I became a stay at home Mom. I often avoid social situations because I feel awkward, and feel like I will do something wrong. Before I had children, I didn't have this issue. I went out a lot and loved being around people.

I am pretty much always cold, my feet especially. I crave sweets almost constantly. I used to smoke cigarettes for 15 years, but quit 7 months ago.

I can't think of any other details right now. Please help if you can. Let me know if you require additional information.