Implantation bleeding????

So on BC but the 18th or February had a condom fall off while sex with husband(with cum and it got stuck inside me for a bit). Well its 18 days later. I tested too early and got two negatives and got blood work done yesterday on the third a day I was supossed to have my period. It came back negative but the dr said it may have been way too early to detect it so if I still dont have my period to come back in a week and we can test again. The thing is, is that I have all the pregnancy symptoms. Exhausted, so hungry, urinating a lot, a bit of nausea here and there, been having stomach cramps and back pains, getting too hot a lot, and more. The night before last I still had no period pains (I always have really bad ovary pains before and during period this time I had none). Then last night I woke up to badddd pain in just my left ovary. Today would've been the last day of period but then I get this very light pink blood. My periods are usually fairly heavy. Does this look like implantation bleeding or a start of a period? I've never been pregnant so I have no idea. It got a little heavier but not much after. It's still this pinky color. Can anyone tell me if it just looks like implantation or period please.