I had one and got an antibiotic. Just make sure that your doctor knows your pregnant. The antibiotics worked so fast and I felt silly for suffering with it for so long.
I went to the Emergency Room. Not et lol
I too was suffering with a headache from last Wednesday to Sunday. When I contacted my ob I was instructed to just take Tylenol. I knew better. This too is my first pregnancy. I went to the ET where I was diagnosed with a sinus infection and they prescribed me an antibiotic. Feel better soon!
Id make a trip to the doctor or make a call to your OB too see what they can perscrible to you. Just my personal opinion, but I dont think any of the over the counter products can knock out a sinus infection. Those can get pretty nasty. If you do want to try the over the counter route first you can take robitussin or sudafed.