Feeling confused, plz help me 😔

Tasha • 31 with 2 kids a boy 9, a girl 5 and I just married the love of my life on 5/5/15, since then I`ve been TTC (a girl)
My ovulation window was 8/22 I didn't have sex that day but on 8/23-8/24-8/25 my sex drive was very high so I had sex all 3 days glow told me yesterday was the best day for me to have sex I woke up with a terrible headache that had me in bed all day, then I started experiencing some mild cramping nausea and no appetite to eat, I didn't have sex yesterday and today is my ovulation day & this morning my husband woke up b4 work and wanted some and I turned him down cuz I'm still not feeling in the mood now I'm having lower abdominal pain and backache..... can I still get pregnant even tho I didn't have sex yesterday or today my acual ovulation day?? I took a opt yesterday and it was positive can I have sex later today or even tomorrow to ttc or did I miss my time not being in the mood???