So you had a concussion
2 days back.... I am guessing since you said all tests were done then you must have gotten a CT scan
of the head also.
The forehead pressure and confusion are side effects of concussion, they will automatically recede in a couple of days. There is no worry of an aneurysm
If you experience any kind of a severe headache
or you feel more drowsy than before then you should visit your doctor.