Can I be infected with HIV from only receiving unprotected oral sex?

Hello doctor,

I am a 31-year-old male. I wish to know what are the practical chances of me being infected with HIV from only receiving unprotected oral sex. It happened multiple times in the course of a one-hour encounter with a CSW. There was absolutely no vaginal or anal intercourse. Exactly one month after this encounter, I suffered somewhat from flu and a common cold-type condition. It developed as follows:

Day 1: It started in the afternoon with continuous sneezing (mostly dry, but not entirely)

Day 2: I started feeling a scratchy sensation in my throat. The sneezing lasted but was less frequent.

Day 3: The throat sensation continued, getting worse. Mild coughing with a runny nose though not severe, and little nasal congestion. Mild body aches at times here and there. I feel a slight malaise-type feeling.

Day 4: Throat discomfort and coughing sensation.

Day 5: Constant coughing, throat pain, throat discomfort, breathing problem, getting worse. Deep mouth-inhaling resulting in a cough.

There was no rise in body temperature, no noticeable fatigue, no serious or persistent body ache, no trouble doing usual chores, no unusual body rashes, and no unusual gastrointestinal problem. I visited the GP on the fifth day of this encounter. He examined my chest with a stethoscope and said no serious cough in the chest and that my condition may be from some mild viral attack, nothing serious.

My queries are :

1. What are the chances, based on the encounter described above, of me having HIV assuming my partner was HIV-positive?

2. Are the symptoms being experienced by me HIV related?

Thank you.