Challenges in doing phd.....

Different people, different challenges in their phd journey...why I'm said like that..It because after almost 19 month in this journey, I can see variety of challenges that had to face by myself and by my phd friends too...Actually and honestly, some people had to leave their family(husband or wife) for phd journey, some people had to leave their kids(either baby or grown up one) for phd, some people had to leave their sick parents for the phd, some people had to spend a lots of money for the phd, some people had to sacrifice the enjoy time for the phd, some people had to sacrifice the struggle time for the phd since have to look after the kids in the family......for me for example, whatever it is...it's my stands that I can't live apart from my daughters..maybe it's sound too extreme, but that is me...because the are my spirits and motivation for me to strive my journey..without them.... how can I live here...but in the same time I'm admit I'm not a best mom to pay full attention to them...sometimes I'm feel so guilty when I have to scold them or made some punishment to them..but I've no choice...that's why although I always try to give my best in parenting responsibilities, sometimes I failed.....as what I've did mention in my previous entry that my daughter's time with me is around 3.30 p.m until they sleep(around 10.00 p.m) and also for weekend..but sometimes when my tense reach at the high level..I couldn't control myself........honestly, before further study, I never scold my daughters or punish them(until my mom felt weird with me)..but now sometimes if my temper came...it will be....my girls...mama always feel guilty....please do apologise me girls......hopefully this summer holiday, both of us(me and my spouse) can made them happy with another summer vacation.....insyaallah...