After Keflex

I haven't been able to find this info online (sadly). Does anyone know what effects one could expect once the dosage time of taking Kelfex is over? I'd been on it 8 days and it ended 2 daya ago - and I'm a little draggy and tired - not all the time but suddenly and for brief periods. I imagine it's from my body readjusting but I don't know and don't know how long I can expect to feel any 'withdrawal' effects. Thanks in advance.