Ovulation question

Angelina

My ovulation test was red this morning. It pink tonight. It’s been about 12 hrs since this morning. Can I still get pregnant if I have sex tonight? I had sex the last 3 nights so I’m hoping I’ve been doing it properly. Have been trying for over a year. One miscarriage in October. Not sure how to properly use the opks and when the proper time to have sex is 😐😖