It is possible?!

I was told nothing weird can happen during your fertile week if you have a cold..it's the same thing blah blah.

WELL...I got 2 positive opk tests on cycle day 12&13 and of course BD accordingly.

I am now on cycle day 18 today and when i went to the bathroom and wiped, there was some stretchy EWCM..which I thought was when I was testing days ago (I check it as I test) so how am I getting it again now?!

5 DPO ..or so I thought.

Was that not my ovulation and this is now or is this an early pregnancy sign??