“Pregnancy symptom or PMS symptoms?”

I just recently had a miscarriage Aug 16. I've been tracking my ovulation days and notice the LH surge peaked between Sept. 30th and Oct.1. I had unprotected sex late Friday (Oct. 1)/early Saturday morning (Oct 2nd) one time and haven’t had sex since. Yesterday (Oct. 11th) and today (Oct. 12th) I started feeling nauseous around 3 and 4 o’clock each day for 2 days straight. I took two pregnancy tests and they both showed negative results. My cycle is due to come in 5 days from today’s date. Did I test too soon and should I wait to see if I miss my period this month before taking another at-home test to see if I’m pregnant?