Infant Autism

<span style="font-family: Brush Script;">Hello All,
My name is Grace and I have a beautiful baby girl Abby who is 6 months old.  Since birth I noticed that Abby was not like other babies, she cried all the time, I could never comfort her and just didnt do what newborns do (sleep, eat, poop, sleep, eat.) she would sleep 20 minutes up 40, this went on for 3 months.  Then we went for her 4 month check-up.  I had noticed that Abby didnt like to be held, in order to calm her down I would need to put her in her swing.  I tried to cuddle her and she moved until I let go.  She was great when I swaddled her.  I tried to make eye contact and she would turn away. To this day, she moves her face when I try to move her to see me.   Her smiles were just not there.  What was I doing wrong? My baby doesnt love me? Am I a horrible mother? These questions came to my mind on a daily basis.  She was not meeting her milestone. She hated tummy time and everytime she gets upset she hits herself. Yes, at 4-5 months old she was doing  this. Changing her clothes was just awful, once that onsie went over her head she cried like there was no tomorrow.  Even rubbing lotion on her is awful.  I felt I was hurting her.  Abby loved to stare at objects. Then I though , perhaphs Abby has signs of Autism.  I started reading on line, asking people but everyone thought I was just crazy, that it was imposible. SHE'S TOO YOUNG!!! everyone would say.  But I brought this up with the pediatrician. She observed her and noticed the same things I did.  She indicated some concern.  Boy was I relief to know that someone knew what I was talking about and didnt think I was crazy.  She referred me to a specialist and in fact said she has red flags for autism.  She will now see an occupational therapist three hours a week..  I am so grateful for my pediatrician.  I struggle so much with my little Angels. She does not seem happy and that hurts me tremendous.  I still feel sometimes that she does not love her mommy. 
Has anyone gone through this? I know that it is too early for the diagnose.  But I honestly think Abby is Autistic and I am ok with it.  She is my little angel, she will just see the world in a diffrent way and learn things differently.  II do not have the support of her father.  To say the least he's a jerk and thinks nothing is wrong with her.  Any help, recommendations, suggestions advice you can give me. I will greatly appreciate it.  I am now struggling with putting her to sleep. I can no longer swaddle her because she flips over but cant flip back. She cries for about 1 hours  straight
Thank you in advance for all your help!</span>