Worried or overthinking?

Lily

So I take the pill and have for over a year and I have protected sex. But the last few days I randomly noticed my nipples are kinda tender. I've had sore boobs before around my period but not since I've been on birth control. Im only 16 so there's a chance I'm just growing. I'm not set to have my period till next Wednesday. My boyfriend's really worried I could be pregnant but I just think it's normal for a girl especially my age to have tender breasts around this time. Opinions?