Disappointment again

Since last Thur, i start to have brown discharge. It continue for 5days and my menses just don't want to come full force. When I am hoping that it don't come at all, last night it came. Thought I can get pregnant this time but false alarm again. I don't understand why, my menses became very irregular these few months. It takes more that 40 day for one cycle :( Getting harder and harder to conceive. Why other people get pregnant so easily.........Am I really giving myself a lot of stress???? I am giving up, waiting in vain really make me more and more disappointed each time. Hate the feeling of waiting.........:(