temp drop after triphasic hike!

Hi everyone! I v been trying to concieve (conceive) for 9 months now.....I have tried almost everythig but still nothing. I started tracking my bbt this month and I confirmed I ovulated and then there was a triphasic hike on 8dpo and then light pink creamy discharge 9dpo and 10dpo and then a temperature drop today (11dpo) from 36.97 to 36.88. I am really confused....can anyone please take a look at my chart and tell me whats going on? thanks!