Acid reflux, semi-hardened cervix, random mild stomach pains within last month or two, could it be signs of early pregnancy?

Hard to tell: It can be hard to guess whether a woman is pregnant or not. A urine pregnancy test gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), 1 week after missing a period, or after 1 week after having a "weird" period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test.