hi, i'm 32 with one child and ttc#2. my cycles are 30 days. my last period was 6/21, so i'm 5 days late with pregnancy symptoms. my nipples are sore, my breast just last night started looking fuller, frequent urination and being really tired. i have lower mild abdominal crampinig on and off for about 3 days now. also i feel a heavy feeling in my uterus. i have taken a pregnancy test with negative results. how long should i wait to take another. or could all these symptoms be a sign of a hormonal im balance. i really need to know cause of being a high risk pregnancy and have to take lovenox injections. thanks for all your help!