Trying To Conceive. Nausea, Tender Breasts, Leg Cramps, Pinkish Spotting. Pregnant?

hi, i ovulated 19-21 roughly and had intercourse those days, im not on birthcontrol and and trying to concieve. i normally have a 5-6 day period and last two months its been every 4 weeks exactly. this month im having early pregnancy signs such as, neausa tender and larger breasts, white dots on my areaola and blue vains visable, leg cramps etc. i know its early but tested anyway and got a negative. but ive been bleeding from the 2nd with no cramps and bright red blood that started off pink and got heavier but not heavy enough to fill a pad yet. my last period was 4/4 this is all weird for me. so wondering what could be happening.