Hi I have been having a headache since Thursday, from forehead going to left side of my head, could it be a migrane?

Possible, but needs. Headaches are pretty non-specific and can be caused by a wide variety of conditions and situations.

My advise is if a headache is not responding to simple over the counter anaelgesics and is present for more than 3 days, you should have a check up done.

If you have fever, visual problems, muscle weakness, vomiting or other significant associated symptoms, you should consult your doctor sooner.