Possibly? Help.

So my boyfriend and I were sexually active in the beginning of April(2nd) . We had sex continuously every day until the sixth multiple times a day unprotected and the first few times were protected but then we didn't use protection and then on April seventh I had a very very very small amount of blood when I wiped out and later I went back to the bathroom when we went bowling and it wasn't there anymore so is that a sign of implantation or have any of you had implantation that wasn't very much ....? I would like to know, I have read about implantation and what it should look like but everyone is different so I am looking for a little help. Do you recommend digital test if so which ones I have been thinking about clear blue.