TWW 11DPO

My Period was Dec 29-Jan 2 I ovulated Jan 7 .me and my husband dtd jan 7 & 8 and that was it cause he work out of town we been TTC for about 4 months now. I been having back pain and yesterday I notice a lot of cm increase when I went to the bathroom I usually don't notice that much. My AF is due Jan 24 according to the app on my phone. Trying to see is it to early for a hpt or should I wait to miss period. Really don't want AF too show her face this month.