Unexplained anxiety and panic attacks

Hello. I am new here, so forgive me if I am posting in the wrong forum or asking the wrong question.

I am 30 years old male. For the last few months, and much more in the last two months, I have been victim of serious panic and anxiety attacks. It has also led to some sort of sleep disorder. It has become very frequent that I either don't fall asleep easily, or wake up sometime, like 2 am, with rapid heartbeat.

I work with computers. I am a programmer, but my anxiety is SERIOUSLY hindering my ability to work. Say, I download some software from somewhere, and 20 minutes later I feel an urge to remove it, as I feel somehow endangered by it (hacker attack, spy, spyware, whatever). I also frequently feel observed. As if someone is trying to set up some trap for me at the least expected moment.

On one hand, I consciously know that the dangers I have described are unlikely or quite minimal at worst. Someone might steal my data at worst, but its not like I am going to get killed or anything. Consciously, I know that my feelings are irrational. But on the other hand, the thoughts and these fears keep flooding my mind day after day, constantly. Computers really cause me anxiety as of late, even if all is going all right... A big red flag when one works in computer science.

It all began some 3 years ago. I would check light switches 10 times to see if lights were off. Same with kitchen. Same with doors. Someone suggested that I was suffering OCD. (Obsessive Compulsive Disorder) I somehow momentarily managed to overcome that type of behavior. But as time went on I began to suffer from these straight anxiety and panic attacks, 99% of the time unexplained (from a realistic point of view). But still annoy me big time.

Three years ago I was also under some ultra heavy stress like I have never been before in my life. Don't know if this has anything to do. When I was a small child, I think I was also diagnosed by some deficiency in the frontal lobe.

I am thinking about visiting a psychiatrist soon, but since I live in South America appointment dates are a bit away. I was wondering if there are any initial steps I can take in the right direction? Someone recommended me to take B vitamins supplements so I began taking them recently (started some 9 days ago, after at least 20 years without taking anything like it), one of them being a Stress B Formula.

Any chance that the B supplements will help me any?

Also, I am not sure what I actually expect to achieve by writing this here, but I guess it makes me feel better.

Anyone been in a similar situation?