Honestly, it's really hard to determine what bumps are with a picture. Those could be oil glands, genital warts, or just normal skin variations. You really need to see a doctor to get them checked out.
If they started appearing 4 weeks ago, and it sounds like more are appearing, that sounds typical of genital warts, but a doctor needs to determine that. There are literally dozens of things that cause genital bumps.
Let us know what happens.