thank you for your query.
is common during early pregnancy
As you did not have regular periods, you might have been having polycystic ovaries
, and both conditions go hand in hand with calcium and vitamin D deficiency.
Early pregnancy is when the pelvis gets vascular and the uterine size starts increasing causing stretching of pelvic ligaments and muscles.
Also, you tend to feel more tired and easily fatigued, and pain thresholds are lowered.
Just to be on the safer side, consult your OB GYN about it, and ensure that it is not because of any impending miscarriage
or uterine pain.
That seems most unlikely since you do not have any bleeding / cramping / spotting etc.