I agree - did she ask you about your sexual activity? If you didn't have any since your last STD testing, she wouldn't have tested you for them.
You can always ask what testing they did, and get copies of all your lab work. I have copies of all mine.
Have you gotten counseling for what happened? Your spelling of "gynaecologist" suggests you are European, maybe, so here's the Rape Crisis Network for Europe - https://www.rcne.com/links/sources-of-help-for-survivors/ If you aren't in Europe, and need resources, let us know.
I'm sorry that happened to you.
Probably not, because there is no reason to suspect STI. Fishy odour is very much linked to bacterial vaginosis which is common.
Really sorry to hear what happened and the stress it causes you.