Should I test in the morning

[Sarajandb]

My husband and I have been TTC for around 4 years. I have endometriosis and it's never happened we've startee the fatiloty process, however this month we have one last really good effort. Last period 26th Dec normal 28 days cycle ovulate 5-9th.. We did the deed 3rd, 5th, 8th and 9th.
So I'm 8 days, after ovulation been cramping mildly since 5dpo so for 4 days, cramping. Due on 23rd. Husband is keen to purchase a 1st response which can show 6dbp... Which would be today. Would tomorrow mornings 1st wee be a good time to do it.. Im so scared but also imencely impatient. Do have some symptoms but also symptom checking so could also be in my head for sake of wanting.
4 days, of cramping from 5days after ovulation though I can't see another reason for it. I didn't however think the cramps lasted this long if it was implantation?

If you're only 8dpo OP I wouldn't. That's the earliest they can show up. I found this very helpful www.countdowntopregnancy.com/pregnancy-test/dpo-chart.php?dpo=8

They don't show 6 days before period, they are 6bdays from the day after AF is late iyswim. So if you are due on 23rd, 24th would be classed as late so it could possibly show on 18th. Personally I think its very early and you are more likely to get a false negative that early.... Never stopped me testing though!!