Im usually regular 30-32 days. Last month we tried and I also used OPKs and got a positive (I believe) on CD18. I was also a week late for my period. Maybe due to stress of hoping Im pregnant. So this month I decided to not try or worry about it. Here I am... last night we dtd with me thinking I couldnt possible get pregnant since its CD21/22 (dtd @ midnight) so just for my sanity I went to take a opk at lunch and it looks positive but the test line seems a tad lighter? Im unsure. Help please 
