Munoz,
from what oyu've said in other posts I am aware that you lead a very stressful & very busy life, having your daughter's father be a "man"!!! (now guys relax I tell my son to say "women!) would certainly make it all worse.
As to your tolerance level being low, has it occurred to you that:
1) you are only human not superwoman!!
2) you have way too much on your plate for one preson to handle!!
3) a young child can easily (no matter how good) drive anyone to distraction!
4) the proiblems your mum is dealing with affect you & cause stress especially as she's so far away
5) your daughter's father, well erlationship problems are srtessful anyway but add a child into the mix & they go crazy
6) you work & study on top of all this
now is it any wonder that you're gettting stress headaches & other stress related symptoms????!!!!
if there's no natural therapy/health remedy shop near you(which I doubt) find one on-line leforg.Com (life extension foundation or biosynergy.Com are starting places & get some stuff to help you relax such as vitamin b's, same (i can get you the full actual name but here it's sold under same), 5htp(tryptophan).
Do some relaxation!!!!!!