if you go to the doc and all is well to prevent bacterial build up let it get some air walk around the bathroom your bedroom or even your whole house (if you can) you will fell so much better. good luck.
i notice more of a smell before and during my period. Sweating is probably your culprit. If you wear looser clothing and cotton panties this can help. Sometimes silky panites and thongs, and tight jeans can make you sweat more and cause more bacterial infections.
An odor is not normal. Sounds like you could have BV and that has to be treated by a prescription that a doctor calls in. I would get it checked out for that and see what the doctor says.