How much space is enough? Or is there just no timeline? Never been in this situation before..?

My current GF has big time issues with custody and unpaid alimony/child support from her ex. She just found out that he is getting married and also his new GF is pregnant, he is living the high life while she is broke and nervous about the custody of there son. She is a great mother and he is not the greatest dad. They have been split up for 2 year and we have been together for 1.5. The first year or so was awesome, just the past few months she has been stressed and broke. I picked up the slack where I could and her and her son loved me, talked to me and had me over all the time. Well she broke up with me and asked for space. I am used to contact with her several times a day and it is like she shut me off. She still contacts me on a daily basis but it is much shorter conversations, and she spends her time upset at home rather than in my comfort (which she always loved) I am sure this is not about me, but I am just looking for some solid advice on how to handle. It is just rough because it was like being "married" to someone where you talk constantly (mostly her calling me) to wanting space. Definately no other guy, and like I said she still contacts me on a daily basis even if it is for 10 minutes. I dunno...