Late period-3 days

Had a normal period in November, had sex that month as well but I think I ovulated earlier then glow said. December I had what I thought was a light period, didn’t have to change pad but did anyways. Now my period is late by 3 days an still no sign of it coming on. I have had three children the last being 14 months old. I feel what feels like baby flutters an I know that sounds crazy being if I am I’d be early but with each pregnancy I felt them moving earlier then before. I’m scared to test being I am 36 an had a very large baby last. 10lbs 6oz

Can you ladies give me some encouragement please…