This may sound kinda weird...But please read

I have this strange vaginal odor....It's very very strong and smells exactly like raw onions. It's very unpleasant. Now I have heard that eating onions can make your vaginal secretions smell/taste differently, but I have not eaten any onions in the past while. The only thing I can think of is, in the summer time when me and my boyfriend went to his lake, I was chopping up onions for dinner (which I did not eat any of by the way) and it was like just inhaling the scent or something made me have the same vaginal odor. It went away after a week or so. Well a couple weeks ago, for the first time since then, I was chopping up onions at work, and now all of a sudden the odor is back, and has been there for about a week and a half or so and I would say I have cut up onions 4 times since then, so I am thinking that may be why it's not going away. I have showered and washed numerous times, I don't have any sign of an infection of any kind....Everything is normal except for the odor. Does anyone have any idea? I just got my period today, so we will see how things are afterwards...But I am thinking about just leaving the onions next time for someone else to cut, but this is disgusting and I am so embarrassed and don't even want to have sex with my boyfriend anymore.

please let me know, thanks!