Hello there, I am 7 months pregnant with my first baby, aged 35, and I have a raised black mark on my thigh that I first noticed about 2 weeks ago. It is about 2mm circumference and 1mm depth. I thought it was a blood blister at first, even though I cannot recall injuring myself. I tried to rub it off but it just bleed a little when I rubbed and stayed the same. What should I do please? I am very worried that it may be NM. Thank you kindly, Bria