Possibly pregnant help scared

So I had sex the 20,23 and the 25 in December and that period was from the 9 to 15 that's a normal cycle for me. Then January I had a cycle from 5 to the 10 but then bled agian 27 to 31 AMD nothing this month yet except sore nipples and crampy and sometimes tightness in the same area oh and i have been throwing up and I've over time my throwing up is happening closer together days wise u threw up today and then felt hot, nauseous most of today on and off. Should I be conserned the last post I made someone tried to bash me for my post so I'm being more direct no rude or insulting or negative comments please