I'm worried that I might have some kind of brain tumor

So I've been having headaches and phantom smells that have come and go for  about a month by now. My headaches are mild to moderate at most and are not in a specific location, but I get them pretty much daily, ranging from barely detectable to an uncomfortable pressure feeling around my head. And in the past week or two, they've become more frequent. I've also been having a constant low grade fever for the past several days, but idk if this is related to the other symptoms I'm experiencing.

The symptom I'm especially concerned about is my phantosmia. I can go  several days without getting phantom smells, but some days I'd have several episodes per day. It's always the same foul and unrecognizable smell deep in my nose and my episodes usually only last for a few seconds (though I've had them last up to 10-20 minutes). However though, I've read online that with brain tumors such as glioblastoma, phantom  smells lasting just a few seconds are common and could indicate epileptic activity caused by the tumor, which is why I'm worried. I've also read about ppl who have gotten diagnosed with brain tumors  following phantosmia experiences.

And lastly, I somehow feel like my cognition has declined ever so subtly,  like I've noticed myself becoming slightly more forgetful in the past month and occasionally having trouble finding the right word. I don't know if this is just me being hyperaware though.

So  what do you think? Is this just my hypochondria/paranoia getting the best of me or should I actually get these symptoms checked out?