I think this is the side effect of Amoxycillin
. Antibiotics can cause a tummy upset as it disturbs the natural flora of the gut. Try taking natural yoghurt or any yoghurt drink with lactobacillus
Fortunately, this effect is self limiting, so after a few days you should feel better anyway.
however can occur if you have fever
or infection (in your case, urine infection). Hopefully once the infection is gone you should feel better.
Of course, pregnancy
sickness can make you feel very ill as well. But, in another 4 weeks, you should get some relief from it as well.