temp question (m/c ment)

I don't actually temp but on the odd occassion I do take my waking temp just to have a look and obviously worry myself -lol. My temp always seems to be the same in the later half of my cycle e.g 97.7 does this seem normal and does it have to change much everyday, everyones that I check out don't seem to have that flat line that I do. I have had two miscarriages in the past year so I am obviously ovulating and AF is also pretty well regular but these temps have me worried. Also before ovulation (or what I expect to be) my temps are often 97.3, and also pretty flat.

I must admit I used to temp about 2 yrs ago and there was abit more of a variation, but always seemed quite low too. Should be temps be higher. I also look it this morning hoping for a rise as I am trying to become pregnant again and still at 97.7 approx 10 Dpo so I guess this is not a good sign of pregnancy either.

Thanks