Pregnancy Anxiety

My husband and I found out I am pregnant and we are excited to begin this next adventure in our lives. I am about five weeks along and I see the OB next month and if all goes okay we should be due in late August. I take Vybrid and I haven't tapered ( I'm discussing this with the OB) and before I found out I was pregnant I drank mountain dew like it was water because I got incredibly tired and mistook that for pre period fatigue. I did cut my caffeine intake after testing and I am making an effort to eat healthier. I am afraid we will lose it. Im concered because I thought I would be throwing up by now. I'm eating like crazy at this point , I'm peeing a lot, boobs hurt, everything smells, gas and as of earlier this week, heartburn. I usually take Prilosec for that but it's not helping much. And I'm worried about if we lose the baby. I keep having thoughts that me andmy husband and I get to the ob and they say they can't hear anything or the baby never developed. I am very sorry if I triggered people with this, I am just worried that this might happen and worried it will be because I did something. I am excited to be expecting but I'm worried about what could go wrong......sorry if it's a bit rambling.