Are Fever, Sore Throat And Rash After Unprotected Sex Indicative Of STD?

About 2 months i got a fever, sore throat and rash. The rash started a week after my fever and sore throat, it started on my arms and on my thighs (it didn t really itch, maybe from time to time). I went to a small emergency location and they told me i have scarlet fever/strep throat. They swap my throat but came back negative strep and they said they have to take it to the lab and it will take 1-2 days. i never heard from them again. i must also mention that they took blood samples to see if i was getting a new infection because my heart rate was fast (i m terrified of hospital and worries like this), but it came back normal.They gave me antibiotics and all my symptoms went away within a week or two. Although i m looking at my arms right now and i see it kinda bumpy. I was involve with a person for about four months ( during the time i got sick) that i have known for years,but lost contact and we reunited. We did the following : 1. he fingered me in several occasions, (one time he had a deep cut between his fingers but it was yellow not bleeding, he said he got cut at work with a blade to open boxes) . At the time i didn t think anything of it and i think i remembering mentioning to him and said he didn t use that finger or hand. 2. He preform oral sex on me without protection on 3 different occasions 3. we had protected (regular) sex one time 4. i left him a hickey 5. we deep kissed a lot and one time i remember having a canker sore (you know the ones you get in your mouth when you don t brush your teeth or i don t know from what) and kissing him HE TOLD ME NEVER GOT TESTED BEFORE FOR ANY STDS/STIS AND NEVER BEEN TO THE DENTIST (HIS BREATH NEVER SMELLED). the only thing i saw was that he had like vein in his gum on the front/ top teeth. He also had unprotected sex with other women, last one being with his girlfriend of 4 years. Do you thing i could have an std/sti from the things i mentioned? Do you think i really had something else and not strep throat? I plan to get tested but i m really scared.