Off bc since Nov 24th negative test on the 6th symptoms increased anyway i could be pregnant?

The test on the sixth was negative for a minute or two I thought I saw a very faint line. I also did not take it in the morning mid afternoon or evening. I have had diarrhea, (sorry tmi) and then constipation on and off since. And I feel bloated yesterday and this morning. Can't sleep or sleeping to much. I am Bipolar so I am on medication but I have an appointment with my med doctor on the 15th to discuss getting off or changing meds so a safe pregnancy since my fiance and I are trying. I haven't had a period since Oct 17th I have been in for a blood pregnancy test which came back negative on Nov 29th. Should I test again in the morning the minute I wake up or wait longer? I've also starting pre natal vitiams for about a week to help the process and my health. First time posting. First time trying to conceive. Need help and advice?