Second Trimester Headaches

I’m only 15wks, but ever since 12wks I’ve been having headaches around 4 out of 7 days a week. They’re mostly sinus headaches caused by allergies, but I cannot get them to go away! I’ve restarted Claritin for allergies, Sudafed occasionally for really bad congestion after my doctor cleared me. Of course I’ve tried hot showers, sleep, Tylenol, small cups of coffee for the caffeine… I’m at my wits end. I don’t know what else to try to get this to stop. It’s impacting my work and general quality of life because I have a headache more often than I don’t right now. Has anyone else done anything that has helped? I’ll try anything safe I’m desperate!