I think i'm having a unknown pregnancy..serious responses only ?

At first I having symptoms as nausea tiredness and metal taste in mouth took pregnancy test gave me negative and then went to gyn and told them about it gave me a another test came up negative and even took a blood test!!!! Negative again..so after that I wasn't to much worried about thinking its in my head..then I start feeling movements in my stomach with a extra pulse being extra tired and hungry..and oh my period has been very irregular..and people say I have a glow and I look pregnant and I am overweight about 218pounds to be exact.