It is definitely something you want to treat as an emergency as you'll want to get treated ASAP and be put on antibiotics.
Speaking as someone who had lyme disease undiagnosed for around five months (of which three of those were about the most god awful horrible of my entire life); DON'T start taking medication against a disease you've not been confirmed to actually have!
Ever heard of antibiotics resistance? Well, this kind of hysteria is exactly how that stuff develops, and then we no longer have a working treatment for those who actually DO catch this terrible disease. Let's all be logical and rational here, mkay?
For those interested, lyme disease is one evil mother effer of a bug, and this is no joke. I got it in the summer of 1995, never noticed it happening. For upwards of two months after catching that damn disease I didn't feel a thing. Then the muscle ache started setting in in my legs, more in one than the other. It progressively got worse and worse over a few weeks until it was so bad I couldn't sit still, couldn't walk, couldn't lie down, couldn't sleep. In parallel I was also losing muscle strength in my legs, making moving around more and more difficult, particularly up and down stairs, but just kneeling to tie my shoe laces was a PITA.
Meanwhile the GP Doc I was seeing was convinced I had muscle inflammation and prescribed me voltaren... Jeeesh. What a maroon, you don't go almost completely lame in your legs because of muscle inflammation! But in the 1990s, many in the medical profession did not know of or understand lyme disease around where I live, much less knew how to diagnose it properly. So I had to go to the emergency room of the city hospital, and they took me up to the neuro ward almost immediately where I then spent three friggin weeks in a hospital bed! Ugh.
And it took me until mid-december that year until they let me out, although I had started feeling better after just a few days of antibiotics. Took me until march the following year before my legs were back to full strength again.
What really bugs me though? ONE!!! time that summer I was out in tall grass, and that friggin' tick still got me! Raaarrrlll! *mad* And now a quarter century later I'm wondering if the infection did more to me than just what I felt back then, the temporary pain and the physical weakness. These days I sometimes feel as if my brain's been dulled, I often can't find words I'm searching for, I'm very forgetful. I have to think hard to do simple stuff like arithmatics in my head. And I'm not that old, I'm not 50 yet for chrissakes.
So, yeah. It's no fun, lyme disease. Take this shit seriously, I implore you. But don't start eating antibiotics unless it's confirmed you actually need it! That is really important.