Just after some advice please.

My period is never like clock work but it’s never this late.

I had my last period 9 weeks ago.

Iv been taking metformin for 4 months.

Iv been getting a sharp pain to the left side of my belly button for a week.

Sharp pains in my boobs.

I have done two tests from eBay (just the strip ones) and both have been negative.

My question is, should I do a digital clear blue test?