What is my problem?

Warning: Winey post ahead!

I am tired and cranky! No its not the time of the month. This week I have been really struggling with the gym again. I have been fine with my weights but severe DOMS has made me tired and cranky. At the moment I am finding it really hard having DOMS and trying to look after my babies (no not my boobs, my kids!). I almost feel I can't cope with everything! I am wondering perhaps if I am overtraining? I know after Tuesday next week when I get my boobs done I will be having some time off training which I think will do me the world of good, but I also battle with myself mentally. I feel I train hard enough and am at the point where my body is not quite where I would like it. One half of me wants to be super lean with muscle as I think its very sexy, but the other half of me feels like why I am putting in all the effort and not reaping the results especially if it is making me so tired. I need the energy to be able to look after my children properly. It makes me wonder if I should change my training and just train to be happy and fit rather than focus on how much I can lift and what I look like.

I am toying with the idea of maybe doing some pilates but again that would mean not doing some weight training as I only have 6 days I can train and won't fit it all in. Since having Bailey I can't seem to get my stomach flat and I know my abs have not tied back together, so wondering if I should do some pilates to get my core back and for flexibility and then throw a couple of days of weights in just to keep my muscles where they are. Oh who knows what to do I think I put too much effort into thinking about my fitness. HELP!