Am I testing to early!!??!!

We have been trying to conceive for a month now. My ovulation date was the 21st of this month. We had sex on 15th, 17th, 20th, 21st and the 22nd. I have tested 4 times and they have been negative. I have been feeling most close to all pregnancy symptoms. Very swore breast, lower abdominal pulling sensations, minor headaches, fatigue, bloating, nausea but not vomiting, food cravings but once I’m eating I begin to feel discomfort and have to stop eating and lay down. I am only 8DPO but I am having all these symptoms!! Am I testing to early? I am set to have my period May 9th but I NEVER have these types of symptoms during my menstrual cycle.