My birth cont pills r giving me headaches. I forget to tak them and bleed randomly. Can I just stop without facing problems? I had a baby 4mo ago.

Yes. If you are having particularly bad headaches with birth control pills you should stop them. Also, contact your doctor for other birth control alternatives as i'm assuming you do not want to have another pregnancy at this time, right?
Yes, you can stop. You can stop you birth control pills when you choose, but the end of the pack or cycle is recommended. Just do not start another pack. You should consult with your doctor on alternate reliable forms of contraception, which do not require daily maintenance, such as the "patch", nuvaring, depo-provera injection or an iud. If you have completed childbearing then sterilzation is an option.