LH surge is followed by ovulation. Hence the chances of conception are best within 24 to 48 hours of LH surge. Hence may be Friday might be too late. However you can just take a chance and see.
The answer is based on information provided. Exact advice is not possible without a proper examination and investigations. You are requested to consult your Doctor. Take care and keep us posted.
I am using the strips too and have a husband that travels, so I understand your concern. But if your LH surged, you have 24-48 hours to conceive. Your ovulation should be within 2 days or so, once your ovulation happens, you have to wait until next month