So my hcg is a bit all over the place I'm worried

Britney • I'm a happily married to the love of my life and I'm a 27 year old who is graduating university soon this year and is hoping to start having some beautiful babies soon! We have had one pregnancy and miscarriage at 7 weeks so far hoping for a rainbow baby
I really want this baby to stick and be healthy this is our first pregnancy and we are already in love with it! We found out I am a- this week when I went to the er which my family doctor for some reason didn't tell me? This is what has been causing my spotting so far in this pregnancy and now my hcg levels were going up but the last one went down which made me nervous but I also have done my tests at all different blood clinics which the doctor said that are run differently and hcg is evaluated on a different scale on each so you can't really compare them (some were govt some private some public) so just keep going to the same one and don't worry as long as it is going up it will be OK I have completely stopped spotting since getting the shot I need for a- blood and I am feeling more nauseous each day and having more pregnancy symptoms everyday I hope that is a good thing! I'm so nervous all I have been doing is praying this week our baby is healthy has anyone else had a good experience with something similar or has any helpful advice? I'm very nervous and worried I want our baby to be healthy!