Im 5 weeks pregnant ,been with my ex partner 11 weeks ,he wanst me to abort seys he doesnt want another baby?

im 5 weeks pregnant very emotional and already have two children aged 5 and 18 months, my 5 year old has autism,me and the father off my unborn baby have split up hes begging me two abort the baby ,family are telling me it will be way too hard and pointing out all the nagatives about my situation,i cant think straight and the father has already said that we cant work while im pregnant and he wont be involved as he doesnt want another baby,advice would be great as i have booked a date on tuesday for a termination,i cant stop crying ,i just dont know what to do x