What Does Fish Like Smell From Vagina Indicate?

Like three weeks ago me and my boyfriend had sex and he came in me two days later we were having sex and there was a strong fishy smell so i asumed I had bv since it was the first time ever came in me. We went to the clinic I got tested and was givin bv pills. We havent had sex for like two weeks ( he's been out of town) now we had sex two days ago and its the same thing he came in me now today that smell is back. Do u know what this could mean or be????