I will be writting my Network+ this Friday, and I am wondering what exam I should do next (it's between iNetwork+, Security+, and Server+)? I like the idea of learning the Security+, but I thought

it would probably be best if I learned the other aspects fully first before learning how to manage security issues with them.
Also, so far I have found that the length of time to prepare for the exams seems rather short (2 weeks for the A+ Core Hardware - 1057 score, 1 more week for A+ OS - 929 score, and when I write Network+ this Friday it will have only been 3 weeks since I started preparing for it). Do the CompTIA exams get more difficult, or are they all like this? At this rate I will be able to complete the entire set of CompTIA exams in less than 3 months.