asc, it's crazy how all-consuming TTC can be, isn't it? I never really understood until I began my journey.
For starters, stop testing twice daily! Stick to once daily (FMU), and on from a certain dpo onward. Invest in cheapo dip strips (I buy 50-packs of Wondfos from US Testing on Amazon) so you're not losing an arm and a leg on the overpriced FRERs. My Wondfos picked up a very clear positive at 9dpo this cycle -- and there's no indents to worry about like on FRERs.
The very early pregnancy signs are caused by the same hormone (progesterone) that causes PMS symptoms. You'll notice a lot of overlap, so symptom spotting isn't going to get you far, though it's hard not to obsess. Some cycles your symptoms will be worse. Some cycles, you will notice symptoms you've never noticed before -- that you've probably had many times before, and never paid attention to because you weren't TTC.
Temping can be a good way to track your progress, if you aren't into that yet.
Sometimes, your temp chart can give you clues as to if you've implanted and are pregnant.
It's all a crapshoot until you get that second line, so hang in there!