implantion bleeding? help!!

K
I had my FET 1/20/17 and today I had spotting could this be implantion bleed? I thought it would be a little late to have it? I did take a hpt and the it says pregnant but line is faint. What are your thought is it to late ? I'm so afraid it will end up in bad news considering this is my 5th FET but I did have PGS testing for this round and it was graded AA.