My boyfriend got told he has a less than 5% chance of having kids ..

Iv been with him for 5 years .. and I decided to come off the pill in September .. iv been having regular periods

It's come to this month's period and it hasn't started .. iv been being sick .. sore boobs .. browny discharge .. hiccups all the time .. mood swings .. hair falling out more than usual .. weird cravings ..

I took a test but it was negative

I'm scared incase I do another and it is positive .. only because I thought to myself will he think iv cheated on him

What do I do ?? Please someone help