Pregnant - symptoms but negative

[Shopper246xx]

My breasts have been so sore and tender for over a week now and have increased in size along with blue veins.

I've had tender breasts before but that was due to a contraception that caused that reaction but not used that in over a year.

I feel like I'm going to be sick but not and I'm more tired than usual.

I've had home test and blood test all saying negative.

I'm irregular to but it's been 5 weeks and I'm convinced I am. Are tests usually wrong?