Early pregnancy signs symptoms and conditions

I am sort of curious. I have been reading all the things everyone is saying. I used the ring for about four months.When I had the ring in my period was normal, and pretty much to the date. I actually LOVED the ring. Well its been almost two months since I stopped, I had a normal period in April (08) and haven't had one since and its almost the end of June.I have taken pregnancy tests and they have said I am not pregnant. I do know that I could be getting faulty tests, but I sort of doubt it. I haven't had any early pregnancy signs that you normally get when you first get pregnant, but then again I already have a three year old, so maybe I wont have any early signs.. I am just stressing over this BIG TIME.
I just thought that it was extremely odd, being normal to the date, then when I finally got it out of my system, I am not having a period.
If anyone has any insight please let me know!!! Thank you so much!!

I'm freaking out!!!!!!!!! SOMEBODY WITH THE SAME SIDE EFFECT PLEASE HELP ME....I was on YAZ since the summer and it sucked cuz I'd get my PD every 2 weeks....i finished my last pack on November, took December off and towards the end of the month i had unprotected sex so i had to take the PLAN B pills and three days later i got my pd. so everything seemed O.K.....theeeen i started on this jump off LOESTRIN PILL. I was supposed to have "protected" sex for the first month but towards the end of the month (when i was NOT supposed to be ovulating) i had unprotected sex and i haven't had my PD. for 2 months now....Last month i did a pregnancy test and it came out negative....I don't really have any "early pregnancy" signs....i feel fine but CAN ANYONE LET ME KNOW IF MISSING A PERIOD IS NORMAL? I'm just thinking that switching from a different birth control pill and taking the plan B pills might have messed up my cycle. Thanx.