i'm 23 years old and i have irregular periods. i havent got it yet and i wonder if i'm pregnant or i won't get it till next month. recently i had a brownish mucous discharge with a little of blood that lasted a couple of days. then soon following that when i eat or i'm hungry my lower abdomen down to my vagina spasms. it does that while i eat and afterwards. the beginning of may was the first time i had sex in two years. i also get this pasty metal taste in my mouth. i took a pregnancy test and it came back negative but i'm thinking i might need to get blood drawn. any suggestions?