After IB, How long should I wait to take a Pregnancy Test ?

Lyndi

So I had about 3.5 days of light spotting (which I absolutely NEVER Spot) and now my period is 3 days late ( I am Never this late), so I took a test this morning but had a BFN, my breasts are slightly sore, been peeing constantly, bloated, backache, some cramping off and on, exhausted & increased appetite!

So, my question is... How long can it take to get a BFP after Implantation Bleeding?