I'm assuming you mean profits from AdSense so I moved this to that forum.
It's perfectly normal for your AdSense earnings to go up and down. Remember, different ads display on your site. Some are very well targeted, others may not be as targeted so your clickthroughs will fluctuate all the time.
My AdSense earnings differ by $10-$30 dollars each day and I'm sure others will vouch for this also. Just keep building content and traffic and you'll see higher earnings. Congrats on your first dollar day.
