That ovulation thermometer is roughly around $20 and have been doing a little research and I think that is a goer. I didn't get to buy it yesterday as I had to pick up from the post office a parcel and it happened to be my OPK's. The ones I bought must be different to a lot of yours as I read the instructions and then tried one and a faint line came up and on the instructions that means negative. I am at cycle day 21 today so I am guessing I probably have o'd already this month. I don't think this was the month for me so guess just waiting for AF. I find these next 1-2 weeks the hardest as your not sure whether you have conceived or not. I was thinking of buying the thermometer so I can get used to what my temps are like before and after o I suppose. What do you guys think, or should I wait to get AF before buying one? My friend did give me her maybe baby but it never seems to work for me, whether I am doing it wrong or I just NEVER ovulate. This does make me scared as well but I think I just need to give my body time! I got told that I can't go to the doctors unless I have been trying for a year to see what is happening. Fingers crossed it happens before then!!