A smell

Is it weird to have your vagina smell after you've had sex?? I had sex with my boyfriend like a day ago and today I noticed it smells a bit metallicy. What i've read from google is that if its a metallic smells then it usually means that your period just ended (which it did. We did it on my last day so there was no blood) or it could mean cum... but he didn't cum in me... They also say it can be a bacterial vaginosis but there's no itching ot burning sensation aswell as the discharge is normal like usual. Any thoughts of what it could be?? Thans :)