TTC but help

So I am 7 dpo. I’d say it’s been past two weeks since the first time we TTC. Been feeling the worst nausea and neck pain, as well as headaches from time to time. Took tests before but came out negative. I figured it was too early. Yesterday, I spotted but when I’d use the restroom, there’s none anymore. Today I spotted also but very faint and light. Any thoughts? And when should I test? Thank you! :)