TL;DR: Over the past week, but especially the past two days my anxiety has been through the roof, and I've been getting very agitated for reasons that never bothered me before, like crowds and random sounds. My thoughts have also been all over the place, and my mind keeps going blank mid sentence. I'm starting to get very concerned that something serious is going on here.

This all started about a week or so ago. I don't know specifically what triggered it but I think it started after I read a reddit comment about rabies. I have hypochondria, so that really terrified me. I spent the next few days obsessing about until yesterday, when I had a complete panic attack meltdown over it. Since then I've had about 3 more panic attacks about it. 

However, since yesterday, I've also been having the very concerning mental symptoms that I described and I'm started to get worried that something is seriously wrong. 

In general, outside of the hypochondria, my anxiety has been absolutely through the roof, at times near panic for no good reason. Random things have also been making me anxious, for example a couple of hours ago(late at night), there was a car idling with it's lights on on my (quiet suburban) street, and it for some reason filled me with a sense of dread and fear. I couldn't keep myself from staring out the window and internally begging them to drive away. I have no idea why this made me so anxious. It's not usual to for a car to be idling on the street late at night but hardly a cause for concern. Also, random noises having been making me anxious for no reason, like someone driving by my street or some noise in my house.

I've also been getting agitated for random reasons that never bothered me before. For example, I was in a busy part of the city today where there were a lot of people on the sidewalks and in the stores I was at, and it was making me very agitated and on edge, and also super irritable for some reason. My heart was pounding. This lasted the whole time that I was there, about two hours or so. 

I've also been feeling really off mentally. I keep seeing clothes and furniture out of the corner of my eye and briefly thinking it's a person. That sometimes happens, but it's been happening way more the past few days. My mind keeps going blank mid sentence and I can barely get it back on track. When I'm typing, I keep losing my place and forgetting how to spell words. I keep getting this dazed getting where I feel kind of out of it or I'm not really interacting with reality. It's hard to describe but it's very brief and not too pronounced. 

My head has also been feeling pretty weird too, like sometimes I feel very lightheaded or sometimes I feel a lot of pressure on my temples. Also, I feel more sensitive to light and flashing lights.

Overall, this has got me really worried. I'm trying to tell myself it's just because of my normal anxiety, but I'm extremely afraid it's a sign of something much worse or more serious, like something medical. I have no idea what's going on and need advice.