My period is 18 days late and recently 2 weeks ago my nipples started feeling sore and that's it. However it then went away and the soreness went into my breasts making it swollen. My boyfriend and I do have intercourse, but always with protection using a condom. It has never been ripped or fallen off during intercourse. For those that may tell me to take a pregnancy test, I actually did 5 days ago at my college campus in the health center and the test came out negative.

Also weeks ago I have been sick for about 2 weeks with a bad cough to the point of losing my voice and to cure it I have been taking numerous medicine such as Tynelol, Robittussin, and such. Since my period has been late I have been stressing a whole lot until last week when the test came out negative, but since my period hasn't came yet, I am starting to worry again which I shouldn't!

2 days ago my breast started becoming more sore, heavy, and firmer.

Can anyone help me? Thanks!

Also I am a 20 years old

I would go to a doctor and have a blood test performed, and then other testing to figure out what's wrong if you're not pregnant... Hope you find out what's up soon!