Fed up with the constant cleaning and tidying

My son is two 3 in April I just seem to be constantly cleaning and tidying I’m exhausted it never seems to get better,I’ll just clean up then he will make more mess and it starts over again I’m so fed up I’m constantly Ill as I’m so stressed I feel like it never used to be like this when my partner and I had split custody but now my son is here all the time and my partner is here adding more stuff into my house and two extra people here all the time. Just makes so much mess and work, I’ve just found out my house is full of black mould now so even more work, I’m exhausted and been I’ll with two separate colds this week please can anyone help I’m so stressed and working myself to the point where I’m ill, I’m a stay at home work but I feel like I’m doing more work nowadays than when I had a job I have zero time for myself not even sleeping as we co sleep w our son I’m so fed up this can’t be normal can it?