Why is this so hard?

I didn't make it to the gym to work out. Big shock there! Not that this is an excuse, but it is a cause. I got my period last night. I can't do anything when I have my period, let alone work out. I am watching what I eat and eating out somewhat less. I've made dinner two nights in a row (tonight is an experiment so we'll see if I eat it) and I brought my lunch today. Tomorrow I'm eating a salad from Emily's as a treat to myself and then I'll make dinner- whatever that is. I just have to force myself to work out. How? Today my psychiatrist told me I was overweight. Ouch!