Bv and maybe pregnancy

So last night i started getting a thicker discharge my lady area was irritated. This morning i woke up and started having the bv smell. Me and my bf had sex last night but he didnt ejaculate. This mornin when i wiped myself before goin to the bathroom. (To check discharge) i noticed it was pinkish in color. When i was pregnant with my first i had yeast infections back to back. Could that have been implanation bleeding or just from bv?