Am I Pregnant .... Should I be concerned?

Nae

So my last period was January 19 and didn't end until January 23. But last Monday me and my ex, got a lil frisky with each other. He only fingered me but while he was doing so... He pulled out his 🍆😶 but I stop him from entering inside of me. I only gave him a handjob. This is my thing, this week I've been feeling sick. I haven't had morning sickness but I have been feeling nauseas and today I have a cramp and headache. The nausea only last for about 5 mins then go away. I must b paranoid bcuz I didn't have ACTUAL SEX❗❗❗plus I feel like a cold is coming on so yeah. But should I take a test or am I paranoid. But my next period don't start until the 16th 🤷🏽🤷🏽 or should I wait until then to c if I'm actually pregnant or paranoid.