Symptoms on the pill.

I've been on the combination birth control pill for about four months now and I never experienced tender breasts only on my break week or very very close to my break. I have started a new pack of birth control after my break week I am seven days in and I have a super tender breasts and a little bit of cramping.. Is this usual? I'm nowhere close to my break week and I take my pill on time everyday and I do have sex without a condom. Are these symptoms usual? First thing I thought of was pregnancy lol.