Pregnancy tests in America (Florida)

Elysia • Baby girl born Feb 2019!! 👶💖 followed by 3 angel babies 👼

So I’m from the UK and currently on holiday in Florida- I’m due AF 28th but this month I’m like 99% sure I ovulated earlier so could be due AF 24/25th.....

today has been the worse day for me- I don’t know if it’s the heat or possibly symptoms, on and off all day I’ve felt nauseous and had intermittent twinges in right side,

Then this evening my husband commented on how my boobs were bigger and when he touched them they ached!

Now we went to Walmart the other day and looked at tests but couldn’t see cheap ones?

Where is the best place to buy cheap tests??