BBT temping?

Ok so this is my first month taking my bbt properly. I have a few questions? It has been quite hot recently apart from last night I am worried that because the room temp hasn’t been consistent my graph will technically be wrong? Also sometimes I can’t help myself taking my temp in the middle of the day or at night before I go to bed and sometimes it’s lower than my bbt?

Sorry I am just so desperate to fall pregnant and in the dreaded TWW. This is my graph if anyone sees anything positive or not please help. Thank you