I had headaches with my first pregnancy and have them this time as well, although mine started in the 2nd trimester. I'm pretty sure they're quite a normal side effect :)
I also have headaches everyday for the last week.
You're wise not to take Tylenol every day, as it can lead to rebound headaches. Maybe try massage or peppermint essential oil? And be sure you're drinking plenty of water.
Drink lots of water. Is your blood pressure OK? Any blurry vision? You want to make sure it's not pre eclampsia too.
Is it normal to feel weak and shaky at 7 weeks , I've been feeling with low energy and weakness and shakness as well and idk if its normal even after I eat. And I always have a water bottle with me .