Hi Spookyspoonie! I like your name btw. Is this an antibiotic that you have taken before? Could it be some gastrointestinal distress from the med? Many antibiotics cause stomach stuff. If it persists maybe give the dr's office a ring and they can try a different antibiotic. This has happened to me.
Spookispoonie, Hi. A couple of months ago I was getting pain on my left side, just behind & under the lowest 2 ribs. After xrays showed 1)stool & 2) large gas bubble, the GI doc explained the turn of the intestines is sharp and with my IBS I was constipated from antibiotics. It may be something similar for you, but just to be safe you should call your doc before the weekend hits.