I switched from Microgestin fe 1/20 to levora .15/30. This is my first month, and my doctor suggested me to go on to the next pack instead of doing the break weak and placebo pills. 2 days into using the next pack, she said to not do it and to stop. It has been 4 days (4 missed pills) and my withdrawl bleeding hasn't came yet. Why is this?

Most likely it is just from your cycle being thrown off from the norm with the continuation of hormones. Does your doctor want you to wait and start with your next period?
Odds of pregnancy, as a cause of no bleeding, are low but always a possibility if you are having sex even with birth control.
I wouldn't be too concerned just yet. Give it some more time... most likely you will have withdrawal bleeding if not this cycle then in the next.
Be sure to use an alternate form of birth control until you start back with the pill.

Most likely it is just from your cycle being thrown off from the norm with the continuation of hormones. Does your doctor want you to wait and start with your next period?
Odds of pregnancy, as a cause of no bleeding, are low but always a possibility if you are having sex even with birth control.
I wouldn't be too concerned just yet. Give it some more time... most likely you will have withdrawal bleeding if not this cycle then in the next.
Be sure to use an alternate form of birth control until you start back with the pill.

Ironically, after posting this question my bleeding started lol thanks

Good to hear. Hope it all gets back on track for you.