I took a cheapie one this morning with fmu & negative! I have had sore breasts all week, cramping & pinching sensation. On Thursday I felt so drained I couldn't wait to get home and lie on the sofa, never felt like that in a long time,been having waves of nausea not often tho. My periods have been irregular the past few months 45,42,34,27. I defo OV round about 16th17th had positive opk & ewcm. I'm thinking I should get first response test or wait?