Hi I Would Like To Ask Something. I've Been Having

Hi i would like to ask something. I've been having acid reflux for 3 weeks now and mu Doctor told me that is has upgraded to GERD. But before she diagnosed it I've been feeling nauseus and all other PMS symptoms that I've never experienced before. This tuesday i had my period (which im not sure if it's a period or implantation bleeding) until now but it's much more lighter now compared to the first day and second day of my period. I have been frequently urinating and a having a feeling that everything do not come out when Im urinating. I am so scared of the possibilities of being preg. What can cause my frequent urination?