Depressed

I feel like I'm going into depression the 2nd time round in 2 weeks. It's been some tough times with little support, no one to talk to, no solution to the problem, an injured foot ( thankfully on recovery ) and a sick toddler and heaps of work piling up in office. I honestly don't know how much longer I can hold up. I know I'm going to snap and I'm trying hard not to. It seems like a dark dark tunnel with no end.