Directly to your question:
1) Your risk probably was zero. Most people don't lie when asked directly about HIV status. And oral sex is inherently safe in both directions-- and for the insertive partner, if the oral partner has HIV, is believed by some experts to never occur. The highest estimated risk is one transmission for every 20,000 such exposures to infected partners. That's equivalent to receiving a BJ a day by HIV infected partners for 55 years.
2) Those symptoms do not suggest ARS.
3) For peace of mind, you probably need HIV testing once every couple of years. But not because of the exposure you describe. If your lifestyle doesn't change, you can be confident you'll never get HIV.
Best wishes-- HHH, MD