You are in a very similar situation that I was in when I applied (lower gpa; felt the pressure to apply as early as possible, but needed my MCAT.)
I pushed my MCAT back from May to mid June to give myself an extra month and it helped TREMENDOUSLY.
Use this (general) timeline and you will be FINE:
Now: Start drafting your personal statement. Seriously. This has a huge impact on those with lower gpa's. You need to tell them why you belong in medicine. Kill it in your classes. Think about asking professors/physicians to write you letters of recommendation.
If you want, do some content review in your weaker MCAT subjects here. Nothing too intense yet.. Unless you have the time to/want to I guess.
May: While you watch your fellow pre-meds frantically trying to write the perfect personal statement, yours is either in it's final drafting stages or is complete. Get your primary application ready for submission to AACOMAS (get your EC's organized, make sure your letter writers are either writing your letters or know they need to write your letters soon, etc.) Ace your final exams in your classes.
Start studying for the MCAT with any free time you may have.
June: Submit your primary application to AACOMAS as soon as you can to get your transcripts verified (this takes a couple weeks... so get it out of the way.) You'll technically need to apply to (one) medical school without an MCAT to do this. This is OK. Schools are usually cool waiting for your MCAT score. Make it a safety school (a school you think you are more likely to receive an interview at based on your stats.) Probably a newer school.
In addition, start (or continue) to study for your MCAT. Hardcore. "Balls to the wall" as the heathens say. This is extremely important considering your lower gpa. Shoot for a balanced 505+. Show medical schools that you can science.
June 30th (morning): Take the MCAT.
June 30th (afternoon): Cry.
June 30th (night): Celebrate.
July: Pre-write your secondary essays so that when schools start sending you invitations to submit secondaries to them (after you send them your MCAT score) you can send them your completed secondary essays immediately. You can find the essay prompts on the school-specific forums on SDN:
Osteopathic School-Specific Discussions
August: Submit your MCAT score to AACOMAS, and send schools your (pre-written) secondary essays as they invite you to complete them.
September - May: Interview & get accepted.
Good luck!