Please, I need your take on my situation;

Around 6 months ago I have a one time unprotected sex with a girl of unknown HIV status (one night stand). I did a routine health check and this results came out;

Last Unprotected sexual exposure Sept 9, 2014

1) Routine Screening HIV test ; Oct 7, 2014 (28 days after exposure) – ICMA HIV Test Repeatedly Reactive >1.45: then, they reflex to an HIV 1 and 2 Differentiation Test for confirmation (Results were HIV 1 Non-Reactive and HIV 2 Non-Reactive): The results were giving to me via phone since I was out of the USA at that time. The lab recommendation was for me to get an RNA test on a new specimen. Since I was out of the country I couldn’t find a place to do this RNA test, so I went to a private Lab in the country I was and they performed the following test;

2) Oct 15, 2014 (36 days after exposure): COBAS E-411 ECLIA: NEGATIVE (they performed the test twice with the same blood sample just to make sure). The Lady at the lab told me that this was a 4th Generation Test (test for Abs and Antigens), but I don’t have a way to confirmed since the results document only says “HIV COBAS E-411 ECLIA: NEGATIVE”

Then, back in the USA, I performed the following HIV tests;
3) Dec 09, 2014 (98 days after exposure): I went again and did the same original test (same lab but different state): HIV 1/O/2 Abs-ICMA; Non-Reactive

4) Dec 09, 2014 (98 days after exposure): With the Same blood Sample above I requested a 4th Generation HIV test: Non-Reactive

5) Feb 03, 2015 (160 days after exposure): I request a RT PCR RNA Test and the result was Negative <20copies/ml

6) Feb 24, 2015 (180 days after exposure): I went and bought an In Home Oraquick HIV Test and was Negative (only a C line visible)

7) Feb 25, 2015 (181 days after exposure): I went and bought an In Home Oraquick HIV Test and was Negative (only a C line visible)

8) Mar 01, 2015 (188 days after exposure): I went and bought another In Home Oraquick HIV Test and was Negative (only a C line visible)

My questions are the following;

1) Does my first test was a false positive?
2) Can I trust my later Negative Results?
3) I have being having painful lymph nodes under my neck, arm and one leg and weird sensations all over my body.
4) Should I take the last tests (after the first positive) as Conclusive Negative?