An accident

i have 2 guest coming for dinner tonite. i have antoher 2 relatives staying over my place. Last night, we had a really late nite til 4am. I woke up really late, but manage to do all the marketing for tonite's dinner and do preparations. But i only realise i forget one item . Hence i took my bicycle to the nearest provision shop, but before i could start i fell, and a great humpty dumpty fall. i was wet (morning had rain ) i was angry at myself. anyhow i went home to change and walk to buy. everything seem fine, then a old lady told me (just as i crossed the traffic.)
"there is an accident infront, terrible......" she was mumbling . i notice she is quite teethless
"huh?"
" a student was knock down by a car... terrible...."
i look where she pointed but see nothing, except a big bus at the bus stop with lots of students.
I continued walking, then i noticed the bus reversing, where i saw the scene. a taxi stopped in the middle of the road  and...there was a girl laying on the street. someone was making a call, someone was talking to her with 3 looking over. and people here and there. suddenly i recalled when my girl was hit by a van in London last year. my tear just flow , i could stop myself. she was fortunate to have a doctor around to help her. the girl was moving but the scene suddenly is so terribly scarely. its 2pm, but i felt it like so dark and errie.  i couldn't walk yet i dare not stop , my tears was just rolling down. imagine i am in Singapore, she is far away in London.
that very nite when she called, (it was late night in Singapore) , my heart just sink from my 8th floor down underground. she had just returned to London and such terrible happened. and for the next few days, i just doing everything wrong. i took the wrong bus, alight at wrong place, forget where i want to go,what i want to do, except for her to say yes. she wants to see me, she want me to take care of her for 2,3 weeks she let me fly. but she insist no. seriously i couldn't forgive myself, i would have just fly.
Though she seem fine now, but the fear is endless.
if only someone can tell me 'how to me a good mother'