Will fatigue get worse during mononucleosis or slowly improve? Please help, I'm a little panicked for info.?

I went to the dr. today for what I thought was strep throat and was told to get blood test b/c I might have mono. The results won't come back until Monday. I work full time and have 2 beautiful little boys who keep me running. I'm really concerned that if I do have mono, I don't know how I'll keep up and still be a good mom! I'm already in the "symptomatic" phase... I have a fever, severe sore throat, headache, etc. But the fatigue isn't unbearable. I just feel really run down. I know the fever and sore throat can go away in a few weeks, and I'm coping with them anyway (sort of.) But, will my fatigue get worse as the mono progresses, or am I going through the worst of it now? (I do know it can take a long time for the fatigue to go away, I'm just thinking that if it doesn't get worse than this, I might be able to handle my life!) Any advice or personal experience to help me try to plan would be great. Thanks.