How long should it take to be "normal" again after stopping birth control pills?

I have been on different varieties of the birth control pill since I was a young teenager. I once tried to clean out my system almost 2 years ago because of having headaches, cramps, and bloating for weeks at a time. I ended up pregnant after only being off for a couple weeks.

After having my son I wanted to avoid pregnancy again for awhile so I got back on the pill after being persuaded by my doctor that it was the best option. But now I am again trying to clean out my system and start planning for another baby. Over 2 months have gone by and I have yet to get a period at all. I have been using ovulation tests daily and according to the tests, I haven’t ovulated. I’m starting to get worried that I won’t ever be “normal” and will have a hard time conceiving. Can birth control really cause infertility? At what point should I see a doctor about my concerns? Has anyone had these issues and successfully had children or normal cycles?