Feeling constantly tired/fed up

[Fressia123]

I'm working FT from while looking after the baby. Over all I don't think that's what's tiring me out as I'm able to cover most of my hours, be with him, walk the dog and do my daily work out. I still have to work for about an hour when my partner gets home.

TBF I think it's more the psychological aspect of knowing that we can't do much in the evenings and that we don't have proper weekends anymore. (DP started working weekends but this is just temporary).

My back constantly hurts but I think it's the chair.

I also promised to teach Spanish lat r today but I just don't feel like it. I want to have a shower and maybe go out for a drink or something with my DP. Would that be so bad?

What can I do to make me feel less blargh? Any and all suggestions welcome. This is just my second week and I hate feeling constantly tired. TIA