on a downer again :(

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Ok so started feeling down again on Sunday , yesterday felt down too but not all day mainly in the afternoon & evening. Today started off down then wanted to cry alot. Ive been ok for about 3 months. Spent most of last year really depressed. I was diagnosed last year with recurrent depressive disorder. So am I on that slippery road again? My husband (I think) seems to think that because I had cbt last year I should be cured.  Im still vulnerable to relapses. When I was at work today I did get an overwhelming feeling like everything was too much for me. Help x