Needlestick injury from used suture needle

[Pandaxoxopanda]

I have accidentally been pricked by a used suture needle on my left foot sole last Jan 15, 2018, 19:30H. I was walking on a treatment room and the suture needle was not disposed properly, it caught on my shoe and pricked me. I didnt saw it on the floor bec I would never thought it would get there plus I am wearing specs. I went there to borrow a cream only. I called the supervisor and she told me to do initial hep b, hep c and hiv test that same night. The next I went to our infection control head and asked her regarding PEP, but she told its for known HIV exposure only. She even said we cannot identify who used the suture needle because we dont know when it was used and for whom. She said we cannot assume and call the patient on that day to come to do hep c hep b and HIV test. So she advised me to do the same tests after 6 months and not to worry about it. But who wouldn't worry???

My questions....
1.I have read that the transmission rate for needle stick injury is rare. Is it true and why?
2. Is it safer to say that suture needle has lesser transmission rate than hollow bored cannula needle?
3. The next morning after that incident, I went to work and I dont feel good. I feel like my body is hot inside like i have a mild fever, so I keep checking my oral temperature but the highest that i get is 37.2 celcius. Now on the second day, I also feel the same but temp is only until 37 degree Celcius but I feel cold quite chillY and i feel a little itchiness in my throat. Is is true that seroconversion begin only as early as 7 days and cannot be at 2 or 3 day post exposure?
4. I did the initial hep b, hep c and hiv test the night i got that prick, the results are negative. She said to repeat it after 6 months. Can viral load test be done as early as 1 week instead? When is the earliest for viral load test to done?
5. Is it true that cough is not a symptom of seroconversion?

Thank you so much for your kind response!

P.S
I knew the suture needle was used bec a suture thread attached to it has dried blood..Relying on their log book and some staff, theres one patient on that day where suturing was done for an incision and drainage procedure on the chest, 4 hours ago after I got the pricked. But of course who would say that they didnt/havent disposed the mnaterials properly after that procedure.

[CurfewX]

Your risk is so low as to be non-existent, for any practical purpose.

First, once outside of the body (or outside of a vacuum), HIV is almost immediately rendered unable to infect.  Hollow-bore needles attached to syringes filled with blood are the only legitimate risk, as the blood isn't exposed to the environment.

Second, most people don't have HIV.  

Third, in the history of HIV, very few medical professionals have contracted HIV in a treatment/surgery setting, and there are many who get pricked or stuck by equipment regularly.

You really have no risk, and should not equate your symptoms with HIV infection.  If you want peace of mind, you can take a 4th generation HIV test at 28 days post-exposure.  It will be negative.

[AnxiousNoMore]

"on the chest, 4 hours ago after I got the pricked. "
If you meant the needle was there 4 hours BEFORE you were pricked then the blood would be really dried as it was on the thread.