Rh- Negative & Abortion Options: A Support Inquiry

Question
i am 31 yrs. old ive had 4 children and i am rh negative. i missed my period this month for sure and possibly last month im uncertain. regardless i do not wish to continue any pregnancy,  my fourth daughter died going on two years ago from sids she was two months and five days so you can imagine how necessary an abortion unfortunately is for me i cant have another baby please tell me there is a way out for me still. i know i sound horrible but its the reality of it. thank you

Answer
Many places provide abortions up to 20 weeks.  You are in California.  Many facilities provide second trimester abortions  up to 21 weeks 6 days.  
Here is a link to several providers
http://www.prochoice.org/Pregnant/find/state.asp?strState=CA
I hope this helps.  You have no need to feel guilty.  You have your children to care for,