Should I have this baby?

I'm 27 years old, no kids, this is my first pregnancy and I'm 7 1/2 weeks gone. I have no siblings, and was raised by a single mother. My mother just died Monday April 4th, and I'm still in shock and grief. I flew back to the East coast from Los Angeles to be with my grandparents and take care of her affairs. She is a hoarder and the entire house is very disorganized, so it will probably take months to go through everything. I'm feeling overwhelmed. I am probably going to move back here because my grandparents are getting old and I feel very alone in Los Angeles, and I don't have a job or anything to keep me there. I have no family or roots in Los Angeles so I've been feeling pretty isolated and disconnected and I know my grandparents need me now and I need them. The pregnancy will make the inevitable cross-country move (me moving out of my apartment and driving cross country with my belongings) very difficult; and it will make going through my mother's belongings hard as well. Furthermore, this pregnancy is the result of me coming in contact with a sociopath. I am a firm believer in having children when one is married, but unfortunately I was involved with someone who deceived me so completely, I am still heartbroken. Suffice it to say, he lied about every detail of his life, and about our future (we even went to Tiffany's so I could point out what style of engagement rings I liked). It turns out he is married with children of his own. Furthermore he is denying this child is his, and I'm letting my attorney sort out this mess. My attorney has advised me to not contact this person, and I'm inclined to agree because I am still reeling from a 9 month relationship that was a complete lie. Now I have this baby growing inside of me and I'm a hot mess of overwhelming emotions, uncertainty, grief, heartache, pain....None of these are the traditional exciting emotions a pregnant women is supposed to feel. I feel like there is a foreign invader in my body, and that my life is no longer my own. I feel betrayed and resentful that I am carrying the child of someone so cruel and deceitful. I feel pain that my mother will never see her grandchildren, and fear of having an abortion. I don't want to regret it. I don't want to be judged. I don't want the pain of it. But I don't want to be a single mother. I have yet to find my career path (I know it's late in life, but I do have a Master's degree) and a stable income. I don't feel a motherly bone in my body. But at the same time I feel if I have an abortion, the loss of my own mother will seem that much deeper, and my grandparents' house that much emptier (my mother was very ill for a long time and she lived with my grandparents). Empty like my body will be, if I have an abortion, and I wonder if I'll be consumed with guilt in addition to all of the other painful emotions I'm currently going through. It's amazing, I'm hormonal and going through a lot right now, and I could really use some support. I've always considered myself pro-choice, and I guess I'm looking for nonjudgmental advice.