Don't do it... you are only 30. Maybe my story will help. At age 32/almost 33 I had my second child in two years and got mine tied. I was burned out from having two back-to-back high-risk pregnancies with hypertension, being on my feet all day as a teacher and trying to keep healthy during the pregnancies, and dealing with the normal woes of pregnancy - weight gain, slow movements, inability to exercise as I normally do, clean the house, etc. I was young and overwhelmed and could not IMAGINE having a third child or even being pregnant EVER again! I knew I'd always have to teach full-time and I just wanted some normalcy back in my life so I could raise my kids and teach and do a good job at that as well.
Fast forward two years later/last summer. My husband and I finally admitted to each other that we had both been thinking about how much we regretted the fact that I had the TL in the first place. To make a long story short, we looked into options for what we could do to possibly have a third child. As I write this, a year after that first conversation we had, I am planning to undergo an IVF cycle at the end of the summer in the hopes of having the third child we both want and wish we could do the natural way, as we did twice before. This decision did not come lightly and it has literally been a year of heartache, pain, regret so deep I can't see over it, more than I could possibly ever explain on line to someone I've never met. The IVF would be all out of pocket since I had an elective TL, by the way, but by the grace of someone "up there" I am going to be part of a research study that will give me the cycle for free in exchange for tracking me super carefully and watching how I respond to the meds.
I am grateful that science can assist us and other couples who can't conceive naturally, but oh how I wish I had just stopped and researched the TL a little more and REALLY thought about it. I can't believe how much different I was then, and I'm only three years older now. Time does change things and it changes your feelings sometimes in ways you can't imagine now. So if you never want another child, fine, so be it, but at least you know you "can" in the traditional way if you choose. My opinion is that the TL should not be done for women under 38, or without extensive counseling... who is in their right mind at 9 months pregnant? Just think about it, I wish I had.