How early is Too Early?

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So My last period was January 30th through the 3rd of February and it placed my ovulation week between the 9th and the 14th of February. I’m trying to conceive. I had Unprotected Sex the 9th and 10th and I took a test today and it was Negative. I also took an ovulation predictor rest and it said my There was NO LH Surge. So what do I do now? I’m sorry this is mu first time. My plan was to keep trying the rest of the month because my next expected period is the 28th of a February. So again, idk what to do?