What do you think?

So I had my period Nov. 22 and that lasted until Nov. 27. Me and my boyfriend had unprotected sex Nov. 28. I had been on birth control pills for about 6 months and ran out during the time of my period and haven’t had any since. The pharmacy says they had it on “back order” so I couldn’t get it when my doctor said I could. I haven’t been able to go to the doctor because she had so many appointments lined up but I will be able to go Dec. 13 (next Thursday). I’ve been having constipation, really bad headaches lasting all day, lower back pain, bad nausea that started out only coming at nights but it’s now lasting ALL DAY as well, my lower stomach feels really tight and i can barely suck it in and my stomach also hurts when i go to the restroom, and all i wanna do is stay in bed. Idk when i ovulated or how accurate this app is, but it claims that I start ovulating tomorrow. I honestly don’t know how to track that kind of thing. But my question is how likely am I to be pregnant/get a positive and how long could it possibly take to actually be pregnant based on that one night of unprotected sex?