wow same as me! my last period was march 3rd. march 14 i ovulatited and spotted 23- 26th! I am waiting just like you! we have been ttc for about 6 months or longer! GOOD LUCK! hope it comes out positive for you!!!!
i would suggest also to wait a few more days then do an HPT=). because its only been 4 days after the spotting because that does sound like implantation. so yes wait 1 more week to test. but remember to use your first morings urin because its the highest for the HCG level=). good luck sweetie! my fingers are crossed for you=)).
To be completely sure and get a accurate reading I have heard to do it a week after missed period.