Premature ejaculation. Is okay to use?

Dear Doc whenever i go for date with my female friend i feel so anxiety and when i start to intimate with her i just insert inside her but sometimes before inserting ejaculation occured only for 1 min i can do this...sir than i started taking viagra 50 or 70 mg than i became a horse :) i was taking viagra for last one year but i take it only once in 4 months 3 tyms a year only ..is it safe ?? My bp was normal those days but i now i check it s 140/ 90 mmhg And sometimes 130/70 n 120/70 mmhg i am scared of my bp ist in notmal range ?? And i am feeling mild pain in my left arm no dyspnea at all i exercise 30 min a day Sir finally i wanna ask u can i have viagra 25 monthly is it okay ? It ll not creat a big problem ?? What else i can apply ?? Lignocain cream on glans of penis is okay to use ??