BBT thermometer

Ugh I feel so stupid.. I'm waiting on my ovulation this cycle and hubby and I are away for the weekend. Just realised I forgot to pack my thermometer!!!!! The next few days are so important for me to temp to see if/when I ovulate. I might miss it completely now. Luckily packed a couple of OPKs.. They're going to have to do for now, but I'm worried about missing my LH surge. Grr!