Im feeling a little down..

Jessica
Can someone make me feel better about my decision? 
I babysit from home, $20 a day, real deal right? I think so!  Because its cheap i have a 3 day minimun rule due to the fact that i also feed their kids. Meals arent cheap! One parent has ben with me for some time now and every week goes boyond our contract and does not hold up her end! Sometimes its 2 days or none for the week!  Being a SAHM its hard enough when only one parent works so this is my extra money! I have a 2 year old. Im 13 weeks pregnant and emotional so my feelings are hurt that i hurt hers! I babysit 2 kids btw so the income isnt much $120 a week. So thats my house hold items and some food! So recieving an unexpected $20-$40 less a week is a big difference! 
Basically i called her out again and this time was more blunt and more serous as to saying; if you cant keep the agreement i cant keep watching your daughter! And i feel as i upset her because we are friends! No daycare would allow this! I feel taken advantage of! 
On the behalf if her she works and her husband can only work when the weather is good, but thats beyond my control. We have an agreement!