Advice Please

I'm a nervous wreck. I'm in a serious committed relationship with my boyfriend and this past weekend I took 2 clear blue pregnancy tests and both are positive. I am on birth control (the pill) and have been for 10+ years, I have ZERO symptoms of a pregnancy besides the fact I cannot remember when my last period was (for sure missed Feb & March but may have had spotting in January??) I attributed it to being stressed out at work. I know, that sounds so stupid and I feel stupid for saying it. But being on BC pills, my periods are usually only ever 1-2 days and very light and I never experience cramping or really any PMS so they aren't a huge deal. I did go back and look at when I purchased my BC from the pharmacy and I did miss a whole week towards the end of December. Could I really be there far along (like 17 weeks) and have no signs or symptoms?! I'm freaking out, I told my boyfriend and we have both agreed we aren't ready for a baby: I'm trying to get my student loans paid off this year (30k) so we can build a house, get married and then have kids (2-3 years) I'm running a million dollar company completely on my own and this just is not a good time for us. We have been doing so well sticking to our plan and I think this will just completely derail everything we've been working for! I think the fact that I am freaking out so much pretty much tells me I am not ready for this. I don't know what to do. I'm on the verge of a nervous breakdown. I have an appt with my OBGYN tomorrow morning but I'm so nervous...I'm pro-choice but I never anticipated having to make this decision myself and it's tearing me apart. I'm afraid of any judgement I will get at the doctor's office and the fact that I may be 17-ish weeks along?! I keep questioning every little thing that is going on with my body looking for any sign and I'm driving myself crazy.