<s>[INST] i had sex on 6/3/2010 and on 6/13/2010 i got a really short and light period and that never happens because i have pcos but after that i started to get very bad nausea and headaches and my breasts were hurting and they have these bumps under the nipple and blue veins on them since then i have gotten a harder and rounder stomach and have felt sensations in my belly i did take a pregnancy test the day after my short period but it was negative so i left it at that so my question is could i be pregnant or could it be something else [/INST] Hello dear, I understand your concern. In my opinion usually the pregnancy symptoms like nausea, vomitings, increased urination, sore breasts start around 2 weeks of missed period. So it might be too early to feel any pregnancy symptoms. The shorter and lighter bleeding might be your altered period. It can be due to hormonal imbalance. As the pregnancy test is negative the chance of pregnancy is ruled out. In order to double confirm a urine pregnancy test can be repeated after a week. Hormonal imbalance can be due to stress also. Avoid stress. If repeat test is negative there is no chance of pregnancy and check for the next period. Stress regarding pregnancy also makes one to feel the pregnancy symptoms. Best regards... </s>