crying over silly things

i think i'm feeling too emtional for the past two days ....... i cried last night because my bf took too long to bring something for me to eat ...... i started arguing till i actually burst into tears .... then i had another episode this morning because my son pee on my mat i started crying again this time i had to try to pull my self together after crying for 10 minutes !!! Honestly im never this emotional at all !!! I am always the one two keep myself together and see about these things on my own ..... I don't know why these little things is bothering me now ..... I'm NEVER this emotional ....