Hi Laila. Perhaps you could try your luck with some of the many international schools in Colombo. If not a teaching job, at least you may be able to get some administrative job. You may need a work visa, but I am notnsure how strict the authorities will be. Being married to a Sri Lankan should give you some privileges when it comes to visas and work permits, but Its best you have it checked with the Immigration authorities.
Another source of employment could be with an NGO. The pay may not be high but you will be doing something for society.
A few ideas. Best wishes!