Well the same thing happened to me and unfortunately I ended up finding out that more then likely I was having a miscarriage. It was scary and tho I usually bleed somewhat heavy it was clotty.. and very painful and the previous month I wasnt even sure I had a period at all.
If you think you are preg you should wait a few more days or a week and test..
Some signs that gave it away with both my pregnancies (am preg now)
Was my breasts hurt
I had morning sickness with this one
I started breaking out
and this sounds odd.. but the veins you have on your chest kinda glow lol.. like mine are very visible at the surface and bright blue.
Altho those are my symptoms a lot of other women I know had those same things happen to them.
Best bet is wait and take a test.. and get a digital cause when I tested for this pregnancy.. I took 3 and all of them were very hard to read and tho one showed a faint line .. when your unsure you say that there is nothing there.. then it faded to nothing. The very next day I went and got a digital and sure enough .. I was pregnant.
Good luck to ya huny!