Advice on ivf should i fink positive ive been trying for 13 years and my luck it wont wrk?

i have been trying for a baby 4 13yrs me and my partner are absolutely fine our results are perfect its unexplained fertility. anyway i am on the first injections of ivf got one wk left then i start the other injection for 10 days and they collect my eggs and replace them afta 5 days and then its the 2 week wait so basically in bout 5 weeks i could be preg which should be so excitingbut i so scared. after waiting for so long to get ivf now ive got it i am just so scared i dont no if its cus its really happening or wether its cus if it does not work then thats it for me. i am crying all the while with worry can any give me any tips to calm me down i am 31 and my partner is 30 and we should be really happy its happening but its really hard please give me some advice