So, I had read it no risk to a high risk depending on the web site. Not a risk seems old like 5-7 years, but a risk of HIV is just recent. It makes me think maybe, you can and it changed in the last couple of years. So, I am at risk and what should I do?

Condom protection isn't necessary and to my knowledge not often used for dildo penetration. Sex toys in general are not common mechanisms of STI transmission. I can envision an exception if used and immediately (within a minute or two) used again on a second person, but that obviously wasn't the case here. Don't you think it likely she cleaned the dildo after its prior use, before putting it away in the drawer? Even if not, STI bacteria and viruses die with drying, so there would still be little or no risk. Whatever website or other source you saw that claimed HIV is known to be transmitted by dildos probably was not a scientifically run or moderated source; I've never heard of or seen a scientific report that this has happened. If it did, it would have to be in the immediate re-use scenario just mentioned.

So the main STI risk from this event was your performing unprotected oral sex on your partner. Anatomically, she is still male, and fellatio -- oral-penile contact -- is moderately risky for some STIs, especially gonorrhea and somewhat for herpes and syphilis, and maybe (but very low risk) for chlamydia, which doesn't often take hold in the mouth or throat. The risk for HIV also is very low:  CDC calculates an approximate risk of 1 in 10,000 if the penile partner has untreated HIV. That's equivalent to giving BJs to infected men once daily for 27 years before transmission of the virus might be expected. That said, perhaps even this risk is high enough that you would want to be tested for HIV in a few weeks. 

All in all, the risks are low enough that testing is optional. But if you would like the reassurance that comes with testing, you could have a throat swab for gonorrhea (valid any time now) and, after 6 weeks, blood tests for HIV and syphilis. Or you could speak to your partner and see if she might be willing to be tested at this time:  if negative (or if she otherwise convinces you she doesn't have it, or is infected and on effective anti-HIV drugs) you will know you were not at risk. Same if she has a negative syphilis blood test at this time -- and a urine test for gonorrhea.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD