Should I keep testing?

Should I keep testing? Is it possible I ovulated early? I didn’t test 2 days after my period was done and started testing Saturday the 16th. I’m feeling discourage. We also bd the 16,17,and 18 app predicted I should have ovulated there 17th. Today I had pale yellow cm with clear and had mild cramping. Yesterday when we were in the car I felt a little nauseous, I also feel fatigue today. Is ovulation near or what? Also, I measure my bbt yesterday and it was 97.6.

#3DPO