I think you ovulated CD18 due to it being your last day of ewcm...plus its the day your temps raised too....if you did ov on CD18 you BD at the right time.
A very nice person on here told me that if it's a solid line it's pretty much 100% right whereas if it's a dotted line it's open for interpretation. You definitely increase your chances by monitoring OPKs/CP/CM and temping.You got a good amount of BDing in so fingers crossed this is your month! x