AFP of 2.68 and scared

I’m 17 wks 4 days with 3rd baby and got a call from the doc on Friday that my AFP came back slightly elevated. I know I’m high risk, 43 yrs old, IUGR with first baby, placenta previa with both kids (but not on this one which was a pleasant surprise), etc. I’m going in tomorrow to retake the test. Everything looked great at sonogram at 16 wks, they did partial anatomy scan and little girl is measuring on target. I’ve read so much stuff about AFP, about potential adverse outcomes related to an elevated level and I’ve totally freaked myself out (sometime reading the scientific papers are the worst). The only thing so far that has made me feel a bit better is the fact that it’s a screening test and not a diagnostic one. But even so, I think I’m kind of losing it and the results from tomorrow’s test won’t be back until Friday or even worse next Monday. Has anyone else experienced this? I think it would be helpful to hear some anecdotal reassurance since the science is just making me nuts. Thanks.