Leaving my family 😔

Please be kind.....I have started a new job and for the first three months I have to be away for several days at a time for training. It wont be forever but I feel huge guilt and anxiety about it. I have been away the past week and I am dreading going away next week. I find it so hard being away from my son (hes 8) and I feel very displaced when I'm away. I have talked to my dad about it (he also travels for work) and he has advised me that I need to do this as it is a career I have worked hard for and this job will forfill me as a person, I do agree because I have put myself aside for 8 years raising my son (still working but in my own town) I met my partner almost three years ago and hes an awesome step dad and they have a fab time when I'm away (mum is the strict one so they push the rules a little when I'm away Haha i dont mind as long as they are enjoying them selves!) So it's not that they dont cope it's my own anxiety that is holding me back. I have been employed as a first aid tutor and am training as a paramedic and it truly is my dream job, I just feel a bit lost....I googled ideas to help with working away but they are all aimed at men there are no articles that I could find about mums working away (as in several hours away) from home. Do any other mums work away from home? How do you manage the isolated feeling? And squash the anxiety and guilt?