Explain this please

Monica

I’m late for my period I tested on the 9th and got a negative my dr said to wait 2more weeks. I have been cramping like I’m on my period for 3 days. And nothing no discoloring or anything. We took clomid this cycle and if I’m not pregnant I can’t get a refill and start the next round till I start my period on my next cycle. What’s going on!? And what is that chance of pregnancy thing.. ?