My fault

Today started out fine, I thought, but now my husband is planning to leave for at least a week and stay at his mom's house.  It is all over the fact that I asked him to do something this month that I usually do, and he forgot to do it last night and so had to do it this morning.  It almost cost us extra money, but ended up not costing.
I don't understand how everything that goes wrong somehow ends up my fault!  I am working to bring money into the house, allowing extra people to live with us and trying to manage my marriage while doing other activities.  It is not easy!  Last night I spent 10 minutes just crying and he didn't even notice.  What can I do in order to make things better?  How do we balance out the responsibilities and benefits in our relationship?  I feel so alone and wish I had my mom to talk to but unfortunately she is gone!  Today I just feel like sometimes there is no point in going on with life!  It just sucks!!!