Am I pregnant?

So worried I'm not pregnant. I had my period on the 24 of August. Hubby and I had unprotected sex on the 4 and 5 of September and I should have ovulated on the 6th. I had some cramping towards the end of the following week my breasts are very sore and I've been very tired. Took a test today and it was negative I'm supposed to get my period on Sunday. Is it too soon to tell? Should I have waited till I missed my period. I really want to be pregnant:/