Third pregnancy.. First baby

I am pregnant for the 3rd time and I am hoping it's a charm. I've been pregnant twice before and both ended in miscarriage. It's been an emotional roller coaster for my husband and I and we are really putting all of our efforts into not getting our hopes up. I know that shouldn't be the case but I am terrified that it's going to happen again. Anyway, I am 4 weeks along and am having tons of symptoms; I missed my period today, my breasts officially have a new bra size and are super sore, oddly I have excessive saliva, I'm tired a lot, and thankfully no morning sickness (although I wouldn't complain if I did) please keep us in your thoughts and prayers or send us good vibes.