Don’t know what to do

So I had intercourse a few months ago now for my first time. I was on the pill and he pulled out..for some reason I have been panicking about being pregnant..I had a light bleed in January but in February I did get my period which these both came on the break of my pill ..but me just overthinking wanted to be sure I wasn’t pregnant so I have taken a few digital pregnancy tests which would have been around week 5,7,9 after the last time I had intercouse and all came back with “Not Pregnant”.. I have felt normal ever since, however these past few days I have felt tired, slight cramps and I’m wondering if it would be worth going and getting more pregnancy tests to be sure as this would like 11/12 weeks after the last time I had intercourse? My period is due next Monday? What do you think