Scared to be pregnant

I took plan b last month just want to let it be known. It was my first time having sex and I was paranoid. He ejaculated. AND WE ALWAYS USE CONDOMS. Not on birth control. 
*I've had sex since(4 times)  and he has never ejaculated. 
*4 days after period Ended again I bleed for 2 days, seemed like a regular period. Had to use pads. So scared it could be implantation but when this happened my period on the tracking app said my next period was in like 24 days. 
*I had gas and constipation, but I'm lactose intolerant(randomly triggers) and took gas medicine and went away. 
* I've been breaking out. 
*I  don't have sensitive breast, darkening nipples, tiredness, or anything. I pee a lot but I don't think it has even increased. I'm taking ALL precautions I feel like I even used spermicide 3/5 times we have had sec and he has even pulled out with a condom but even my friend just does the pull out method no condom and she's no pregnant 

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