BBT charters ? About triphasic pattern

So I've been charting for 6 months consistently. Yesterday was 7dpo and my temp had been pretty steady only changing about .1 or nothing. This morning it went from 98.1 yesterday to 98.5 today (highest temp since starting to chart bbt). Could this be the start of a triphasic chart? I know it doesn't always mean pregnancy and isn't necessarily common. Just wanted to see if anyone has experienced this. The only other symptoms I've had are sore bbs since 4dpo! And some cramping yesterday at 7dpo.