NO matter what you do, always discuss the health risks of any birth control option you're using. Since you're accustomed to the pills, generally that works for you. There can be increased health risks with patches and depo shots. Just make sure you know what you're getting into and ask people that use them, not just your physician.
No form of birth control (not even condoms) are 100% fool-proof. Certainly, if you have skipped your birth control as many as five times recently, you have increased your odds of getting pregnant. If not getting pregnant is your goal, it may irritate your partner, but you should not have unprotected sex and not expect to become pregnant. If he's waited this long, he'll wait until you have been back on your pill for awhile to indulge. Just remember, even if you're taking birth control of any type, (pill, shot, patch) you're always running the risk of producing a pregnancy. Eventually odds may catch up with you.
Best wishes!
another long-term option for you could be to switch to ortho evra, also called "the patch." it has the same hormones at similar levels as oral contraceptives, but all you have to do is wear a small square patch of adhesive and remember to change it every week, instead of having to remember to do something every day. i've been on the patch alone and sexually active with my boyfriend for almost a year and i love it.
There is no rule about taking the pill for 3 months before protection begins...most pills recommend you take it for a week (correctly and every day) before relying on it, although you should refer to the patient package insert for instructions particular to your brand.
It is very, very important to take the pill correctly or it will not work as well. It needs to be taken at or about the same time every day. When you miss a pill, you increase the odds of unprotected pregnancy. What many women do is to put their pill packs next to something they do at the same time every day--rubber band it to your toothbrush, for example, or put it next to the coffee pot if you drink coffee every day at home.
If you can't remember to take the pill every day, discuss with your care provider a different method that may be more appropriate.