Cipro and sinus infection

I have taken cipro before with no obvious problems and am now starting on it again for 2 weeks (1pill a day). This drug is one of a few that people who are allergic to penicillin and sulfa drugs can take to kill bacteria that penicillin normally does. This is considered a 'last resort' drug for us also. I've had a sinus infection as a complication from a dental surgery that refuses to go away for long enough for my mouth to heal - since July 10 (it is now 19Dec). I was prescribed Avelox for the first time yesterday which led me to this website while trying to find pricing info. $168 for 12 pills? at a Walmart? absurd. So I had the doc switched to cipro. They want me to try this 'type' of drug since the others haven't been able to completely eliminate the infection. I will keep in mind everyone here's side effects but I definitely have plans to do a heavy duty DETOX the minute my mouth is healed and I am off the drugs whether I have problems or not. I concur with the constipation though, all antibiotics seem to give me that problem while taking them. Another good reason to do a detox.

I was prescribed Cipro for a bacterial infection... 4 days ago. Almost immediately I felt like my stomach turned to stone. Zero appetite. I feel like I can't get out of bed in the morning, with a feeling of morning sickness as if I were pregnant. I had nightmares, but I wasn't sure if it was this or a combination of Cipro and Lomotil.
I was also given Nexium to counteract the burning feeling from the Cipro. The combo made it worse, making my entire stomach and esophagus turn to steel.
It has to be the Cipro that is making me feel this way. It has been 13 hours since the last dose and I still feel like my stomach is full. I find it uncomfortable to even sit down, if I do, I must sit up straight. Or I must stand, but then my back hurts and I have to sit again.
I am, for the most part, a healthy 39 year old woman .. Had an antibiotic one year ago after being spurred by a rooster and before that, 7 years ago, for a sinus infection. Pills just aren't for me. Especially this one.

Thanks