Is Cetirizine ineffective in AIDS?

Hello doctor,

I had suffered from common cold symptoms three months back. It resolved completely in about 18 to 19 days. Started with constant sneezing followed by a runny nose, then nose cleared and sneezing stopped but felt an uneasiness in palate and throat turned sore, getting worse with time and then persistent coughing. I consulted my general practitioner on the fourth or fifth day who prescribed some medications. I started feeling better after the seventh day and the throat improved. But almost the next day onwards I started feeling worse again but this time it was not sore throat or a runny nose exactly, just felt the mucous inside throat all the time. Never felt feverish as such or found raised body temperature (by touching only) and experienced mild body ache here and there. Nevertheless, around 1 month after this resolved totally as said above, since yesterday I have started feeling same common cold symptoms, runny nose (not sneezing or coughing much though) with uneasiness in the palate, no raised body temperature but little feverish with mild body ache here and there.In both the aforesaid cases I had taken a Cetirizine tablet on the same day (but little later in the day) the symptoms started. But the medicine did not work. However, previously whenever I experienced a runny nose and constant sneezing, one Cetirizine tablet helped.In fact, it resolved the problem. Could you please share your opinion on this, please, why the cetirizine did not work? Secondly, I may have had (but I am not sure at all) a possible HIV exposure around 10 months ago. I did not get tested. I have consulted few doctors online who said that the chances of HIV infection is quite less. Assuming I may have HIV, could it be the reason why the cetirizine did not work? I wish to mention here that I had high blood pressure for which I take medicines and last month when I checked, it was under control.

Thank you doctor,

I meant to say that I have a feeling that I might have got HIV one year ago and during this one year my immune system has been so compromised that I got common cold within a gap of one month and also previously effective medicines like Cetirizine is not working. I never previously had heavy or repeated use of Cetirizine. I took one tablet only whenever I started experiencing the symptoms like a runny nose or constant sneezing. Also, I did not take it for months before the first common cold attack.

Yes, I will get tested for HIV but as of now feeling petrified. Kindly help.