Just been doing some calculations my last period was 11/02/16 long story

If I don't have my period by 17th march which is in 4 days I'll be 5 weeks since my last period I'm not sure when I ovulated as I stopped taking my bbt and don't do opks I have had the heating on got way too warm turned it off, then I started sweating had to open the window bf said it's too cold I was like ok so I shut it but I'm still boiling hot. Sorry tmi but I have sooo much gas (farting) I worried that I will blow a hole in my PJs lol not even kidding 😂😂😂😂 my last 2 cycles January I came on 12th and then the 11th February my cycles are usually 28-32 only had long cycles when I stopped using the pill and then when I got stressed. Basically what I'm asking is should I wait until the 17th march to test then I'll be a week late what would you do in my situation. And how many of you lovely ladies got a positive pregnancy test at a week late and what brand of test did you use? Last time I took my pill was November last year.

I've been pregnant before but last pregnancy was 13 (nearly 14 years ago) and I didn't track my periods and didn't find out til I was 9 weeks and my first pregnancy was a shocker as I got with their dad (same dad) met him May 2000 was pregnant by June 2000 went to live in Devon while we was travelling on the train had a heavy period and cramps feeling sick everything took loads of tests came back negative and then in the September same year I felt rough nausea sense smell out of roof couldn't be in the same room as a chip pan oil made me feel worse and then I took a pregnancy test was positive felt homesick came back went to the doctors only for them to tell me I was 16weeks I had morning sickness all day. Til this day I'm thinking was the bleeding with the first pregnancy was i carrying twins and lost one as I was pregnant. Anyway me and their dad split we are on good terms met my husband and was together since 2008-2013 he left me for an 18yr old (she's now 21 and he's 31) wanting a divorce but money is tight then December 2015 I started talking to a guy and we've been together 13 months Tuesday jusy gone we're very happy and wanting to start a family and now I could be pregnant now but I don't want to get mine or his hopes up so I haven't told him that I could be late for my period. It will be his first child and I know that we will be happy