Don't have an ultrasound until you are at least 5 weeks from the July 5 date when you first had the unprotected sex. You don't want to freak yourself out by not seeing anything, and it is definitely possible to have an ultrasound too early to see something and go home crying because nothing showed up, when you really were fine.
I would not have had another hCG draw less than 24 hours after the first one. You are needing to know your rate of rise in 48 hours, and while the trajectory sounds OK, it would have been clearer if you had just had the second draw after the 48-hour mark. If you can just go get a blood draw any time you want, get one today, and you'll have a 48-hour rate of rise.
It sounds like you probably conceived when you think you did, and your levels are normal for that timeline.
It depends I have always had low rising hormone levels which have not always resulted in a m/c. The best thing to do is keep having your levels checked a few times a few days apart. They usually depending on the person double every 48-72 hrs. I would also req a u/s it could still b too soon to see anything but I would still try. Try not to panic just yet I know that is easier said than done. I'm here if u need to talk. Keep ur chin up!
AP
Even at 5 weeks you can have a level as low as like 5 and still be pregnant. Its not what your level is but that it doubles in 48-72 hours. I had a level of 48 at 4 weeks and now am almost 30 weeks. Also, it looks like hour levels are rising well. Congrats on your pregnancy!