I presume your figure of 155 related to the haemoglobin rather than the HCT which is usually given as a percentage.
A Hb of 155g/L is just above the normal range - a high level could be caused by for example dehydration, as well as other things, and this needs to be repeated.
Normal range would be 120- 150 g/L, although this can vary from lab to lab.
If you have, for example atrial fibrillation, your INR range would be 2.0-3.0- target INR 2.5.
A result of 1.9 is not badly out and needs a slight Warfarin dose adjustment.
They are likely not related, and I wouldn't worry too much.