I was on the pill but stopped it about 3 weeks ago, should have gotten a period straight away as I always do(been on the pill four years) also should have gotten one this week, still waiting, I have tender breasts, thick white mucus and I feel kind of sick, just in my stomach, nothing major, also have weird pains in my pelvis, and I think I'm getting my period just mucus, I also took a pregnancy test it was negative, should I take another one, go to the doctor or am I just stressing out? Please help, thank you.