Am I pregnant?

I'm 15 days late.. And still not started my period. My boyfriend and I have sex most days completely un-protected and we have decided when it happens it happens:

I took two tests one last Friday and one today and they were both negative but is it too soon to tell maybe?

Here's my symptoms;

15 DPO

Awful skin/ spots/ excema

Always tired/ Falling asleep in the day

Nausea every now and again most days but not too regular

Strange appetite- everything is very particular and I don't fancy much

I'm a full time smoker but gone off cigarettes and not had one in 11 days!

ITCHY FEET?! Is this even a thing?!

Any advice would be amazing??