Recently I've been having headaches that pains my head, a LOT. While this is the case with most headaches, this one isn't as normal as my other ones. During my headache, my sight is deterred, i can barely see the sides of my eyes vision (it is VERY blurry). This kind of headache usually happens when i get winded when blowing my instrument for couple of hours non-stop, but this time, i haven't been practising. After having a sleep for about 2 hours, it usually goes away, but it has been recourring more frequently. Is this normal for headaches? Or is this something i dont know much about?