Depo injection

I got the depo injection two weeks ago (had it before I had my little one but been off contraception for 3 years) Before I got the injection I took a negative test as I had to get the MAP beforehand, and after this got given two weeks worth of the contraception pill to take until I got the injection. Last time I got the injection it didn’t affect my periods and they were as normal but this time I’ve not come on my period and I was due it a couple of days ago. I’m now overthinking as I had unprotected seggs the day before I got the injection and had missed the pill that day. Would you say I need to go and buy a test or am I just overthinking it and I don’t have my period due to the injection