Help, advice on spoilt toddlers.. Im losing my mind.

Melisa • Mummy Of 2 ❤

I'm a stay at home mum. I have a 3 year old girl and a 4 year old son. They are both completely outta control, me and my husband are losing our minds. We are constantly arguing from the stress being caused by the kids. They will, throw stuff at me, scream in my face, hit me, throw the biggest tantrum over the word 'NO' or when something they want isnt being done and the list just goes on. I feel like i cant cope anymore, Im pshycially and mentally drained. I dont know how to cope with the stress. I have no help my husband works 12 hours a day, my in laws only pick my son up for maybe an hour or two (they dont want to look after my daughter, not getting into detail as it has been a problem for so long). My mum on the other hand is very sick and bedbound. I look after her for 5 hours a day (with the kids) when my dad is working. We dont afford nursery as it is very expensive where I live. I need advice, I need help. How can I control my kids rather than them controlling me? How can I stop all the constant screaming, tantrums, fighting eachother all day long? They dont do timeouts never been able to sit them in a place more than a second.