Yes you can combine two or more courses on Blackboard. To do so, you need to fill out a Multiple Section request form found on FCLD’s website: http://uhaweb.hartford.edu/fcld/CoreReq.htm.
When you request a Multiple Section course, a new blank course will be created for you that contains the enrollments from all the sections you requested. If you added content to one of your single-section courses, you will need to copy that content over to your multi-section course.
Your single-section courses will still be accessible to you should you decide to use those instead. It is advisable that you keep those courses unavailable to students so as not to confuse them.