Morning Ladies..... I'm not sure what to think!!!!

Ok so i had an BFP in December on the 12th and on the 27 i found out it was an EP which resulted in my losing only my left tube i still have both of my ovaries and right tube. So the very next month my period was normal. Now last month i had a 3 day period which ended in 2 days of spotting. And this month it started off Brownish and than went on for 2 days and than spotting again. While i was at work around 5:45 i felt like i was about to faint, i felt sick to my stomach i had and headache and just felt really weak. Its been 3 days and i still feel that same way. My boobs are sore they been sore all month and for the life of me i cant shake these headaches. im terrified too. Now because of this i went to er pregnancy test was BPN. But im not understanding why i feel so horrible now.Im scared to test again because of the lost from last year. its like i want to know but than again i dont want to be disappointed. What do you ladies think going on? Could it be a possibility of a rainbow baby and it might've been to early to show.