Sinus infection? Or slow bleed?

So.. about 8 weeks ago I got bucked off my horse and hit the back of my head on hard ground. Had a headache for a couple hours and then it was gone.

8 weeks goes by, no headaches, nothing. Then a few days ago I started getting all this pressure in my head, and my back has been irritating me. Been kind of sensitive to bright light and have generally been more lethargic than usual. My mom’s friend is a doctor, and after talking to her about it she said it sounded suspicious, and that it might even be a slow bleed (cranial hemorrhage) because sometimes it can take up to 12 weeks to show symptoms.

Of course then I freaked out, which is hard for me to do. I hate hospitals and am really stubborn when it comes to injuries. However, I went to the ER last night and got checked out. They didn’t do a CT scan or any kind of scan, but after talking to the doctor he said it sounds like a frontal sinus infection. I have never had a sinus infection before, and I haven’t been sick in a long time. I had some allergies act up for a couple days about a week or two ago but that’s it. I don’t have any headaches, no congestion, none of that. Just pressure in my head. Does this sound right?

Basically, I’m asking if you can have a sinus infection without any other signs. I’m relieved that he said it didn’t sound like a slow bleed, but I’m still slightly uncertain. I know you guys aren’t doctors on here but maybe those of you who have had sinus infections before can help me out a little, cause I’m a bit lost.

Thanks!