Help! Could i Be Pregnant?

Hey all, was just wondering if anyone could shed some light on my siuation... Last week i was experiencing sore breasts, nausea, tiredness and had a very light tan discharge when wiping (possibly implantation bleeding??). My period was due on saturday 1st August and i am generally very regular with a 28 day cycle. i'm now 4 days late. i took a hpt this morning and it was negative but i'm still feeling really nauseous and am now experiencing light red spotting which i heard is normal to have at the time you are supposed to have your period in early pregnancy..? We last had sex on the 26th and 27th july and various times in the two weeks prior. i have a doctors appt on thursday but im going nuts thinkig about it!! has anyone experienced something similar and ended up being pregnant??

Sorry haven't had that happen to me - I did experience some spotting just before my period would have been due, cramping and bloating, however spotting was not red. Could be the start of your period - or perhaps you ovulated later in the month then you think (doesn't always happen when you think even regular cycle) so it is possible it was too early to tell on a home pregnancy test when you took it. It's really just a matter of the waiting game, waiting for AF to show up or for a positive pregnancy test. If the spotting doesn't get heavier, try taking a preg test first thing in the morning with the first urine of the day (if pregnant your HCG levels are higher at this time). Sorry I can't be more help.