Pregnant ladies or mothers!

When you ladies were pregnant did it itch under your breast? The hand thats under the breast. Ive been having so much itching and ive never had that before and my breast are heavy. My period is in 6days but i have a feeling im pregnant since i started having colostrum on my left breast(where it itches the most) its been 3-4 weeks since i had sex. Do you guys think i could be pregnant?