Those are all signs of pregnancy, so fingers crossed this could be it for you!
There are two possible reasons why you are expereincing this:
#1 youre pregnant and the hcg hormone isnt appearing on your hpt because its still early days yet.
#2 your body is still adjusting to coming off the pill and your cycles havent got back to normal yet.
I'd say leave it another 3/4 days and do another test! Good luck, keep us posted!