How Long Before Omeprazole Gets Out Of My System Allergic Reaction.... HELP!!!!?

Allergic reaction.... HELP!!!!? - how long before omeprazole gets out of my system

Recently I had the removal of the material in my leg. The doctor prescribed "clindamycin. I thought everything went well, but about a week and a half to two weeks have, I very bad stomach acid. Thought it was just the stress of other things in my life happened, I just had to" Omeprazole . For "omeprazole" for two days, began with a rash all over my body. I do not think it was the "clindamycin" because I had two days before he told me to take "omeprazole", because my leg looked good. My rash has been found to have begun to take the "omeprazole" and has not disappeared. Well, I take Zantac and today I started my new cycle of clindamycin. A few hours later, my skin rashbegan to decay and clindamycin seems to be what the cause. My question is, could my body is a delayed allergic reaction to clindamycin and had no experience or any symptoms of these first two weeks of the canal? And remain, if so, how long an antibiotic usually in the system, so I know when to expect the outbreak, back down? My doctor has the rash, when we thought it was a witness and said Benadryl omeprazole use only. So, now I know what was the cause, I'm going to stop the use of antibiotics because my leg is fine. If I could be an answer to both questions above and get other advice or help would be great. Thank you!