sadness

so im 5 weeks pp i have a 14month old and a 5 week old. finding it very hard always getting upset (crying till my eyes swell up) with overwhelming feelings of loneliness and feeling useless bwcause i find it hard to juggle all the chores, looking after babies,cleaning and cooking etc. i also get upset as i dont get much sleep im always soo tired.as a redult of this sadness i cant eat i have no appetite! anybody else feeling like this? is this just a phase? help