Hi S. - take a deep breath and relax.
I am a 33 yrs old as well and have a 21 month old boy and have been trying for baby # 2 since July (approx 8 months), so this question hit home for me. I just wanted to share my experience.
We had no problem with conceiving baby #1. We decided when he was 1 we would start trying again but that we werent in a huge hurry so if it "happened" great. After about 2 months of taking the relaxed approach and not getting prego, I started doing a lot of research. I bought the ovulation predidictor strips (OPK) they are cheapest I have found at early-pregnancy-tests.com. I also purchased the cough syrup - if you do, make sure that it is ONLY for cough, the cough syrups for colds ect have other things in them that will actually have the opposite effect. (Google cough syrup for fertility and a ton of info will come up) Personally, I didnt feel like this did much of anything.
A few more months went by, and I purchased a microscope (they sell them at the same website above)and more OPKs. The microscope is to do saliva tests. There is a "ferning" process that happens when you are fertile and the microscope can help you see when this happens. The biggest problem I had was that this detects several days of fertility, rather than the OPK that predicts your ovulation day. So used together I think they are more effective. (although, Im not pregnant yet, so what do I know!)I do feel that I know my body and my cycle and have found that I ovulate much later than I thought I did. This should help us in the coming months.
Finally - after just feeling really down about not getting the results I wanted, I did talk to my OB/GYN (Feb of this year) who said there are tests (some simple, some invasive) to test for possible issues as well as chemical options(prescriptions)if the tests came back ok . After hearing about these and doing research I first wanted to try some more natural approaches. (Oh- by the way, we also purchased the fertileaid and I felt it did nothing as well, just my opinion). So I decided to change my diet (lots of fruits/vegi's nuts, ect) and did a natural body detoxification (be sure you are not prego before attempting)and I also purchased a FANTASTIC book - Fully Fertile. I also started doing yoga a few months back to get more in touch with mind/body/spirit. I feel wonderful!! And I feel like my body is now ready to carry a baby.
So my point to this long response...Take care of you first and the baby will come. It's ok to try to get to know your body/cycle better too with things like OPKs. If you cant relax or these methods arent for you, talk to your OB.
Im not sure if Im pregnant this month, its still to early to test, but if not, I am confident that pregnancy is around the corner. Keep the faith! and Good luck to you!
Feel free to contact me if you have any questions or need support!