If you don't get enough calories but feel well, should you eat more?

I wanted to lose some weight, so I strted Insanity and P90x 2 weeks go. In the morning I do the Insanity workout and in the even I do p90x

I thought in combination I'll do weight watchers (the old plan). At first I tracked down how ate usually and then converted it into points. And I was aa bit shoked, because I'm supposed to get 21 points without exercise and I only got in between 10 -15.

But I'm not losing weight at that level and I don't feel starved either. It just feels normal to me. So what should I do? Eat more or less to lose weight.

I tracked down calories for one week too and I got around 1500 calories a day so 1000 less than I should with all that exercise
If you don't get enough calories but feel well, should you eat more?
Post Opinion