It sounds like the pinkish discharge in your case is in fact implantation bleeding. Wait another week or 2 and take another test; then if it's still negative, make an appt with your doctor and see if you can get a blood test. Hope this helps. I am in a similar situation except I haven't gotten my period for the last 2 months and all HPTs are neg, I am waiting to see my doctor in 2 weeks. Good luck to you.
HONESTLY A HOME TEST WILL LET YOU KNOW IF YOU GOT A NEGATIVE AFTER YA PERIODS TEN DAYS LATE THEN YOUR PERIOD IS PROBABLY LATE FOR OTHER REASONS LIKE BEEPER25 SAID. GOODLUCK.. :)
*hpt........stupid auto correct lol
You could be pregnant, I have been having issues myself,and have done a lot of research on this. You may not have enough hcg in your system for the hot to give you a positive yet. Wait a few days and try again. Every 48 hours your hcg levels rise if you're pregnant. I read that you can have a light period the first few months of pregnancy. Also, it could have been implantation bleeding.
On the flip side, you may be stressing yourself out like you said, and causing a flux in your hormones. Only time will tell. Patience is hard, I hate it! But we have to wait and see. Good luck!