Is my chart normal!?

Izzy • DD 5 years old, rainbow baby boy arrived Jan 16 after 3 miscarriages
Hi ladies! I was getting excited this month that my pre-o temperatures were finally within a normal range & stable. Normally they are much lower & really erratic! However they just keep lowering by more or less the same amount each day. Is that ok? I can't find any charts that look similar!! Anyone have any insight? Xx