Symptoms question

Married for 2 years never used protection but this is first month of ttc, has anyone had all the symptoms but then not been prego? 
I've had extremely bad headaches 
Aching bbs 
Dark veins all over bbs 
Loss of appetite 
Extremely tired 
2 seprate nights of painful cramps 
All of which I've never had, but I wonder could I have all this and not to be pregnant 
:/