Excessive worrying about future. Me out!

I'm a working woman and mother of 2yr old baby.no one else is there to take care of my baby in home.me and my baby and my husband who completely works in night shifts. I always worry about my family&kid future.at present I'm working from home.im a good performer but nowadays not able to perform good at my work.so I kept resignation for my current job.because now a days I'm feeling soo  restless and my mind is thinking without my conscious about all past,present,future problems as well.now a days for simple things I'm irritating so much,if my baby cry I will get so much anger sound irritating me alot.even when I'm sitting at system and working also my mind is thinking and worrying about other things.i don't even get peaceful sleep in nights also.please kindly help me out