I've taking clindmaycin a million times i usually get them filled at rite aid i got them filled at walmart they look different. could i be allergic?

Probably not: Different brands have different formulations, but active ingredient remains the same, if u r in doubt of any medicine taking it 4 the first time, go 2 any er waiting area, adminstir the medicine and wait for at least 1 hour, any serious reaction would appear in 1st hour, god forbids if this happens, u r in very place u want 2 be in, any other reaction with subsequent doses is generally minor, u.