I think I am pregnant. If I am I would be about 20 weeks. I am having alot of the symptoms like the headaches irritability sore breasts, sore lower back, mood swings, frequent urge to pee, dizzy spells, yet I am also having very light spotting that only lasts for 2 days. Over the past 5 months I have taken 3 home pregnancy tests and they are all negative. Any advice would be greatly appreciated