please help. do i have cilitis

Hi. I am a 28 years old female. In the past 4 months I have been on antibiotics on and off because of a bad root canal infection. Every time I take antibiotics I take Probiotic Acidophilus also. I stopped the antibiotics 4 weeks ago and since than I have discomforts on my digestive system. Every time I eat, I feel bloated, it feels like I have a lot of gas even though I don't. The feeling is very uncomfortable. Sometimes I have constipation and sometime my stool is very soft but not that often. I have heard that after taking antibiotics especially Clindamycin ( I took Clindamycin also) some people develop a type a colitis which is accompanied with fiber .I do not have any fiber.
Does anyone else had this type of experience or know if the sighs that I have are those of a colitis?
Any answer would be appreciated.