Change thermometer mid cycle

T

So, my thermometer went a bit haywire (I.e. beeping sounded funny and screen flickered) a couple of weeks ago but I was on vacation and the little pharmacy where I was didn’t have any in stock so I continued to use mine as this strange behavior only happened once.

Anyway, fast forward to yesterday and my cycle looks rocky and unstable or flat even though I take my temps at the correct time- not to mention that ovulation is yet to be determined. So I bought a better one yesterday (4 digit one) and temps are very different this morning. My old one is stuck for days on 36.4 and the new one went up to 36.59. WHAT SHOULD I DO?? I’ve read it’s not good to change mid cycle but I don’t think I have a choice as my old one doesn’t seem to be working.

Let me also mention that last month FF kept switching my ovulation date and then took it away all together. Now I know that I could’ve had an anovulatory cycle but two in a row when I normally ovulate and I know my thermometer is doing weird stuff? I’m not sure and I don’t want to waste a whole month!!

Any suggestions?? I’d love to hear from you ladies! Have you had his problem or what’s your solution?

Sorry for the long post and thanks for reading and answering.