Sinuses or migraine?

 So since yesterday, I've had really heavy eyes and pressure in my forehead along with a headache. I was thinking, maybe I needed to get some sleep and slept last night. Woke up today. Pressure was terrible. Could barely keep eyes open and I'm a little dizzy as well. I did have a slight sore throat and stuffy nose a couple of days ago, so I'm thinking that it's sinuses. I bought some decongestant and have taken it and it doesn't seem to be improving anything. Now I'm thinking maybe it's just a really bad migraine.  Still having pressure in for head and eyes. My nose is not stuffy. My ears do hurt when I move a certain way. And I'm also dizzy here and there.  Should I start taking something for a headache instead of the decongestant? I feel terrible 😞