Dear just have sex an if u get pregant it is less likely that all of this symproms are due to preganacyPregnancy
does not cause that time of symptoms in initiation
may cause all this symtoms or u may have some infection or gastric trouble.
U have to do 2 things
First go for USG n rule out preganancy
Second consult ur physcian regarding this symptoms and undergo some basic test
Get well soon