Constipation and nausea...WHY????

Ok this is a TMI question but is anyone else experiencing constipation so bad it makes you nauseated? I've taken 2 Zofrans to help my nausea today they were 8 mg and then I took my prevacid because I felty reflux kicking in. Now I'm laying in bed trying to rest myself as much as possible. Out of nowhere this hit me and now I'm still very constipated and nausea coming in waves when I get up and move around along with a super acidity stomach from my stupid GERD issue. Today I turned 21 weeks and now this all decided to pop up on me. ??