Hey my name's Renee. I'm seventeen years old, and just found out I'm pregnant. wasn't expecting this…

Hey my name's Renee. I'm seventeen years old, and just found out I'm pregnant. wasn't expecting this news, though it came my way anyways, this will be my first child, and tbh I'm scared shitless. I'm just wondering how the hell did this happen. I don't know how fr along I am, for waiting for my ultrasound to be scheduled.. I'm guessing if this is all true, I'm probably near the beginning of my second trimester.. the weird thing is that I continue to have a cycle.. so calculating how far along I am and a due date is impossible!! lol pregnancy tests always came back negative due to a low amount of HCG in my urine. my blood is how j know. any words of advice, I just found out earlier today!! thanks