Infected Blood to Cut on finger!!! - TheBody.com's Bulletin Boards

I am working in a Departmental store with the petrol station.
There a lady customer came in asking for BAND AID for her open would profously bleeding. and i being and customer service manager. went out to help her and tried to put BAND AID with bare hands with full care so that no blood from her wound can touch my hands...THOUGH I USED ONLY FINGER TIPS and while washing my hands i realised that my hand were dry and there was bit of DRY cracks on my tip of my fingers, which were no open cracks or painful was JUST DUE TO DRYNESS as U CAN SEE SOMETIMES IN WINTER UNDER UR PALM, then the thing which is worrying me is there might be a touch of a drop of her blood from her wound which must have touched my finger tips right on the cracks. and must have went in my blood stream.
BUT AFTER I FINISHED PUTTING BANDAID.. I SAW NO NOTICABLE TRACE OF HER BLOOD ON MY FINGER TIPS..

I M WORRIED PLEASE HELP!!!

PLEASE CLARIFY!!!

Even if thinking that i had some cuts of skin due to open of card board curtoon to refill of grocery..
and then a little bit of blood must have touched my those unknowingly cuts...
OR it should be open wound to get infected.. means do my hand to bleed profousely...
1) how much blood is required to pass infection this way
2) How much blood should be present to cause infection and the CUTS should be visible and bleeding for infection to occur..

After 5 weeks .. i feeel the following symptoms..
1) Back pain since past 10 days
2) nauseatic (since last week)
3) Eye pain and LEFT EYE irritating since 4 days now
4) spinal cord pain

I am working in the store thats why i have to stand and serve ppl for 7-8 hours..

i know that can be the reason but has never happened before.. and WHY NOW??????

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