You should probably take a day or two off the bike to let your hands/wrist recover. You might also take a look at your bike fit. Hand and wrist problems are generally caused by too much pressure on the handlebars. You may need to raise your bars up a bit. Most bikes come with pretty low bars relative to the saddle height. For new riders, this can cause various problems, most commonly numbness. You might also pay attention to your hand position on the bars. If you ride with your wrists bent back, you can irritate the tendons.