4 weeks, 4 days symptoms

I'm 4 weeks, 4 days. Got my BFP on 1/9! Strong lines! I haven't had too many symptoms other than fatigue and breast tenderness. I got put on an antibiotic yesterday for an UTI. Today I was experiencing a headache and took a nap. I woke up with some cramping and pretty bad lower back pain. I wiped and had some red bloody discharge (TMI) I wiped a few more times and then it was gone.