I take my birth control pill at 6:30pm everyday. yesterday i forgot it and today took it 4 1/2 hours late. so i took both at 11pm at night is that ok?

You should be ok: It is best to take your birth control pill at the same time of day but the scenario you describe should not be an issue. It is a much bigger problem if you routinely are late on your pills. Set an alarm on your phone, or put the pills next to your tooth brush to remind yourself to take them on a regular basis. You should still use condoms , even though you are on the pill , to prevent std's.