Please Answer Me, I Am To Scary.. This Is My

Please answer me, i am to scary..
This is my story:
I have just 16 years, but i jave one doubt. I can't continue normal with normall life. Situation getting more worse when i meet one girl...
What is happen:
Before 3-4 months, when i lying in bath were is be water, normally,i picked up some plastic object and start with anal masturbation. I, masturbate few times for 10 days. I washed it with soap in same water (water, is be dirty, did it change something?). But, i didn't sure, did i wash it every time... Now my anxiety killing me, i can't stop thinking about it..
Now my question:
Did i put myself to hiv or any other std risk?
Sry, for my bad english, that is because english isn't my native language.
Ty for answer..