To douche or not to douche?

Please comment your choice. Since my last period like 2days ago I'm having a hard time getting rid of this smell. The smell is like old blood it stinks.Thought I left a tampon in since I've seen post about that but I cant find anything. How likely is it to get an sti/std from oral sex/ raw sex without him nutting inside. I've never had this problem and have had my period FOR YEARS!! I'm a little concerned but can over react at times.

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