Sad confused frustrated

In this day of age or even back then it's such a common thing for girls to get pregnant first and then married after and if the relationship works out for the better then that's great. I am in need of advice because, I am lost at this point in my life of 26 years old. A little bit of what I'd like to share is that I am a daughter that is a care taker for my father, and I recently returned back to school this August to pursue my general eds and get them out of the way and possibly move further down to an associates degree or maybe more. I also can't forget to add that I have a boyfriend of 7 years, we broke up in 2015 in August, but somehow got back together recently within this November 2016-2017 new year. Of course within all those 7 years there were several small break ups we had but we would come back together because we'd realize we were just upset or disappointed at the moment but this one year half that we weren't together gave us time and space to learn about our selves and grow in that time span or so I believe it did. We got back together after some time of going back and forth of how serious we both are, with being said just this past week, I found myself nauseous and dizzy while being at school to the point where I had to leave campus. I didn't have my period in August, or I believe I did but honestly don't recall as much as I am trying to remember I cant recall myself having a period in August and now that it's September, I am late for my period. I did mention to my partner however that I felt like crap and came home and hope nothing serious happens to me cause I've never felt like this ever, the next day I feel the same symptoms of nauseous, dizzy, overwhelming feelings that's just not the norm. I ignore it and slept it off, and then on September 11, I woke up that morning and just knew its time to take a test to determine because before when I did miss my periods and I take the test it would be negative and i'd be okay. This time it was positive and I am pregnant, it's been about 3 days now that I haven't told anyone about my pregnancy, not even my best friends, sister or mother. One side of me feels afraid to go this route because i'm not ready for this baby and I love my man a lot but how do I know if this is actually the right path for me when its such a common thing for girls to get pregnant and married right off the bat and then that's just that? One side of me says, it's gonna be okay because if others can do it then why can't I? I'm 26 and my dad is not going to be here forever since he has health issues and my mom too so better for them to just see my kids before they do move on to the next life one day. I don't want to grow up and move from taking care of my parents cause I know when I'm gone to be married, it will not be the same for me to always be over their house anymore or is it? I also don't want any judgements from people as well of me being pregnant, and then being married because I always told myself I will not do that to my parents but here I am now pregnant and unsure of what I am wanting to do with my next steps, and I haven't told anyone. The reason why I haven't told my significant other is because, I want us both to take the test at the same time together so I can actually see the real face expression he has without telling him on the phone or just saying I've done it myself. Who should I tell first? two of my best friends are mothers too, but I don't want to be overwhelmed with what to do and how to do it because I'm that type of person where when they say things it'll usually get to me, so is it wrong to not share yet? and what about the marriage cost of me and the wedding? how is that going to go? I know my man said he will take care of it and we will be together, but that makes me feel like he will marry me only because now I am pregnant although he did propose to me 4 years ago and we just didn't work things out, so now I just really need all the advice I can get. Should I tell my mom first and then see what she says? but then I don't want her to stress too and then get sick....or should I keep the baby? I know so many parents want a baby and theyre trying which makes me feel so bad for even thinking and typing this but honestly I am at lost for words and putting it in the right way so everything that I am saying is how I feel and I hope to hear all the help I can get please. Thank you.