How do I tell my gf she was kinda smelly down there last night in the nicest way possible.

To keep everything short and simple we’re both young adults who are MTF who just entered a new relationship together. Last night when I went down for the first time on my gf I noticed that there was an unpleasant oder coming from her genital area. I didn’t say anything as I didn’t wanna ruin the mood and the smell was manageable. (The isssue is I’m very sensitive smells and if a smell can be really unpleasant to me) The other issue is when I went down on her she forced my head down which I didn’t really mind but I wish she woulda gave me a heads up first. I know it’s worth a lot for her to be able to do this with her as I know she has a history of sexual trauma and body confidence. And I really want things to work out between us. This has been a genuine issue for a while where I can’t really call someone out when they do something I don’t like or if it was something that they weren’t aware of.